diff --git a/.github/workflows/test-on-push-and-pr.yml b/.github/workflows/test-on-push-and-pr.yml
index 5b80d23..d1a282c 100644
--- a/.github/workflows/test-on-push-and-pr.yml
+++ b/.github/workflows/test-on-push-and-pr.yml
@@ -12,8 +12,19 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.12'
+
+    - name: Install Poetry
+      run: |
+        curl -sSL https://install.python-poetry.org | python3 -
+        echo "$HOME/.local/bin" >> $GITHUB_PATH
+
     - name: Run 'pr' target
-      run: make pr
+      run: poetry run poe pr
 
   alpine:
     runs-on: ubuntu-latest
@@ -21,7 +32,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Run alpine integration tests
-      run: DISTRO=alpine make test-integ
+      run: DISTRO=alpine poetry run poe test-integ
 
   amazonlinux:
     runs-on: ubuntu-latest
@@ -29,7 +40,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Run amazonlinux integration tests
-      run: DISTRO=amazonlinux make test-integ
+      run: DISTRO=amazonlinux poetry run poe test-integ
 
   debian:
     runs-on: ubuntu-latest
@@ -37,7 +48,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Run debian integration tests
-      run: DISTRO=debian make test-integ
+      run: DISTRO=debian poetry run poe test-integ
 
   ubuntu:
     runs-on: ubuntu-latest
@@ -45,4 +56,4 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Run ubuntu integration tests
-      run: DISTRO=ubuntu make test-integ
\ No newline at end of file
+      run: DISTRO=ubuntu poetry run poe test-integ
diff --git a/.gitignore b/.gitignore
index 9d46e4c..d0a548e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -153,3 +153,12 @@ tmp*.py
 deps/artifacts/
 deps/aws-lambda-cpp-*/
 deps/curl-*/
+
+# local caches
+.DS_Store
+
+# local build artifacts
+build-artifacts
+
+# native wheels used for testing the separation of the native build
+native-wheels/
\ No newline at end of file
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
deleted file mode 100644
index bb66b03..0000000
--- a/.pre-commit-config.yaml
+++ /dev/null
@@ -1,7 +0,0 @@
-repos:
-  - repo: https://github.com/python/black
-    rev: 19.3b0
-    hooks:
-      - id: black
-        language_version: python3.9
-        exclude_types: ['markdown', 'ini', 'toml', 'rst']
diff --git a/Dockerfile.build b/Dockerfile.build
new file mode 100644
index 0000000..1036be4
--- /dev/null
+++ b/Dockerfile.build
@@ -0,0 +1,21 @@
+FROM python:3.9-alpine AS build-image
+
+
+RUN apk add --no-cache curl make
+
+# Install native wheel dependency
+COPY native-wheels/*.whl /tmp/native-wheels/
+RUN pip install /tmp/native-wheels/*.whl
+
+# Build awslambdaric
+ARG RIC_BUILD_DIR="/home/build/"
+RUN mkdir -p ${RIC_BUILD_DIR}
+WORKDIR ${RIC_BUILD_DIR}
+COPY . .
+RUN pip install setuptools
+RUN curl -sSL https://install.python-poetry.org | python3 - && \
+    ln -s /root/.local/bin/poetry /usr/local/bin/poetry
+RUN poetry install && poetry run poe build
+
+# Keep the built wheel accessible
+CMD ["sh", "-c", "echo 'Build complete. Wheel available in /home/build/dist/'"]
\ No newline at end of file
diff --git a/Dockerfile.rie b/Dockerfile.rie
new file mode 100644
index 0000000..60a7d0e
--- /dev/null
+++ b/Dockerfile.rie
@@ -0,0 +1,30 @@
+FROM python:3.9-alpine
+
+RUN apk add --no-cache libstdc++ curl
+
+# Install RIE
+RUN curl -Lo /usr/local/bin/aws-lambda-rie https://github.com/aws/aws-lambda-runtime-interface-emulator/releases/latest/download/aws-lambda-rie && \
+    chmod +x /usr/local/bin/aws-lambda-rie
+
+# Install native wheel dependency first
+ADD native-wheels/*.whl /tmp/native/
+RUN pip install /tmp/native/*.whl
+
+# Add the pre-built wheel
+ADD build-artifacts/*.whl /tmp/
+
+# Install the wheel
+RUN pip install /tmp/*.whl
+
+# Copy test handler
+COPY tests/integration/test-handlers/echo/app.py /var/task/app.py
+
+# Set environment for local testing
+ENV AWS_LAMBDA_RUNTIME_API="127.0.0.1:8080"
+ENV LAMBDA_TASK_ROOT="/var/task"
+ENV _HANDLER="app.handler"
+
+WORKDIR /var/task
+
+ENTRYPOINT ["/usr/local/bin/aws-lambda-rie"]
+CMD ["python", "-m", "awslambdaric", "app.handler"]
\ No newline at end of file
diff --git a/Makefile b/Makefile
deleted file mode 100644
index 521b61c..0000000
--- a/Makefile
+++ /dev/null
@@ -1,72 +0,0 @@
-.PHONY: target
-target:
-	$(info ${HELP_MESSAGE})
-	@exit 0
-
-.PHONY: init
-init:
-	pip3 install -r requirements/base.txt -r requirements/dev.txt
-
-.PHONY: test
-test: check-format
-	pytest --cov awslambdaric --cov-report term-missing --cov-fail-under 90 tests
-
-.PHONY: setup-codebuild-agent
-setup-codebuild-agent:
-	docker build -t codebuild-agent - < tests/integration/codebuild-local/Dockerfile.agent
-
-.PHONY: test-smoke
-test-smoke: setup-codebuild-agent
-	CODEBUILD_IMAGE_TAG=codebuild-agent tests/integration/codebuild-local/test_one.sh tests/integration/codebuild/buildspec.os.alpine.yml alpine 3.15 3.9
-
-.PHONY: test-integ
-test-integ: setup-codebuild-agent
-	CODEBUILD_IMAGE_TAG=codebuild-agent DISTRO="$(DISTRO)" tests/integration/codebuild-local/test_all.sh tests/integration/codebuild/.
-
-.PHONY: check-security
-check-security:
-	bandit -r awslambdaric
-
-.PHONY: format
-format:
-	black setup.py awslambdaric/ tests/
-
-.PHONY: check-format
-check-format:
-	black --check setup.py awslambdaric/ tests/
-
-# Command to run everytime you make changes to verify everything works
-.PHONY: dev
-dev: init test
-
-# Verifications to run before sending a pull request
-.PHONY: pr
-pr: init check-format check-security dev
-
-codebuild: setup-codebuild-agent
-	CODEBUILD_IMAGE_TAG=codebuild-agent DISTRO="$(DISTRO)" tests/integration/codebuild-local/test_all.sh tests/integration/codebuild
-
-.PHONY: clean
-clean:
-	rm -rf dist
-	rm -rf awslambdaric.egg-info
-
-.PHONY: build
-build: clean
-	BUILD=true python3 setup.py sdist
-
-define HELP_MESSAGE
-
-Usage: $ make [TARGETS]
-
-TARGETS
-	check-security	Run bandit to find security issues.
-	format       	Run black to automatically update your code to match our formatting.
-	build       	Builds the package.
-	clean       	Cleans the working directory by removing built artifacts.
-	dev         	Run all development tests after a change.
-	init        	Initialize and install the requirements and dev-requirements for this project.
-	pr          	Perform all checks before submitting a Pull Request.
-	test        	Run the Unit tests.
-
-endef
diff --git a/README.md b/README.md
index 4a96a3f..f0aa532 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,26 @@ The Python Runtime Interface Client package currently supports Python versions:
 
 ## Usage
 
+### Container-Based Builds
+
+For development or when you need to build awslambdaric from source, you can use container-based builds to ensure consistent compilation across different platforms, and native dependencies linking.
+
+```shell script
+# Build awslambdaric wheel in a Linux container
+make build-container
+# Or with poetry (run 'poetry install' first):
+poetry run build-container
+
+# Test with RIE using the built wheel
+make test-rie
+# Or with poetry:
+poetry run test-rie
+```
+
+This approach builds the C++ extensions in a Linux environment, ensuring compatibility with Lambda's runtime environment regardless of your host OS.
+
+**Note**: Running `make build` (or `poetry run build`) on non-Linux machines will not properly link the native C++ dependencies, resulting in a non-functional runtime client. Always use container-based builds for development.
+
 ### Creating a Docker Image for Lambda with the Runtime Interface Client
 First step is to choose the base image to be used. The supported Linux OS distributions are:
 
@@ -103,38 +123,23 @@ def handler(event, context):
 
 ### Local Testing
 
-To make it easy to locally test Lambda functions packaged as container images we open-sourced a lightweight web-server, Lambda Runtime Interface Emulator (RIE), which allows your function packaged as a container image to accept HTTP requests. You can install the [AWS Lambda Runtime Interface Emulator](https://github.com/aws/aws-lambda-runtime-interface-emulator) on your local machine to test your function. Then when you run the image function, you set the entrypoint to be the emulator.
-
-*To install the emulator and test your Lambda function*
-
-1) From your project directory, run the following command to download the RIE from GitHub and install it on your local machine.
+To test Lambda functions with the Runtime Interface Client, use the [AWS Lambda Runtime Interface Emulator (RIE)](https://github.com/aws/aws-lambda-runtime-interface-emulator). To test your local changes with RIE (Runtime Interface Emulator):
 
 ```shell script
-mkdir -p ~/.aws-lambda-rie && \
-    curl -Lo ~/.aws-lambda-rie/aws-lambda-rie https://github.com/aws/aws-lambda-runtime-interface-emulator/releases/latest/download/aws-lambda-rie && \
-    chmod +x ~/.aws-lambda-rie/aws-lambda-rie
+# Build your current code (do this when you make changes) 
+# We build on a linux machine to ensure native build dependencies are met
+make build-container
+# Or with poetry:
+poetry run build-container
+
+# Test with RIE (fast, repeatable)
+make test-rie
+# Or with poetry:
+poetry run test-rie
+
+# Test the function
+curl -XPOST "http://localhost:9000/2015-03-31/functions/function/invocations" -d '{"message":"test"}'
 ```
-2) Run your Lambda image function using the docker run command.
-
-```shell script
-docker run -d -v ~/.aws-lambda-rie:/aws-lambda -p 9000:8080 \
-    --entrypoint /aws-lambda/aws-lambda-rie \
-    myfunction:latest \
-        /usr/local/bin/python -m awslambdaric app.handler
-```
-
-This runs the image as a container and starts up an endpoint locally at `http://localhost:9000/2015-03-31/functions/function/invocations`.
-
-3) Post an event to the following endpoint using a curl command:
-
-```shell script
-curl -XPOST "http://localhost:9000/2015-03-31/functions/function/invocations" -d '{}'
-```
-
-This command invokes the function running in the container image and returns a response.
-
-*Alternately, you can also include RIE as a part of your base image. See the AWS documentation on how to [Build RIE into your base image](https://docs.aws.amazon.com/lambda/latest/dg/images-test.html#images-test-alternative).*
-
 
 ## Development
 
@@ -145,7 +150,6 @@ Clone this repository and run:
 make init
 make build
 ```
-
 ### Running tests
 
 Make sure the project is built:
diff --git a/awslambdaric/__init__.py b/awslambdaric/__init__.py
index 5605903..e1e5905 100644
--- a/awslambdaric/__init__.py
+++ b/awslambdaric/__init__.py
@@ -1,5 +1,3 @@
-"""
-Copyright 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-"""
+"""Copyright 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved."""
 
-__version__ = "3.1.1"
+__version__ = "3.0.2"
diff --git a/awslambdaric/__main__.py b/awslambdaric/__main__.py
index 5cbbaab..3cd1ad4 100644
--- a/awslambdaric/__main__.py
+++ b/awslambdaric/__main__.py
@@ -1,6 +1,4 @@
-"""
-Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-"""
+"""Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved."""
 
 import os
 import sys
@@ -9,6 +7,7 @@
 
 
 def main(args):
+    """Run the Lambda runtime main entry point."""
     app_root = os.getcwd()
 
     try:
diff --git a/awslambdaric/bootstrap.py b/awslambdaric/bootstrap.py
index cb8d5c3..1847103 100644
--- a/awslambdaric/bootstrap.py
+++ b/awslambdaric/bootstrap.py
@@ -1,6 +1,4 @@
-"""
-Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-"""
+"""Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved."""
 
 import importlib
 import json
@@ -9,10 +7,12 @@
 import sys
 import time
 import traceback
+from typing import Any, Optional, List
 
 from .lambda_context import LambdaContext
 from .lambda_runtime_client import LambdaRuntimeClient
 from .lambda_runtime_exception import FaultException
+from .interfaces import RuntimeClientProtocol, LogSinkProtocol
 from .lambda_runtime_log_utils import (
     _DATETIME_FORMAT,
     _DEFAULT_FRAME_TYPE,
@@ -36,6 +36,7 @@
 
 
 def _get_handler(handler):
+    """Get handler function from module."""
     try:
         (modname, fname) = handler.rsplit(".", 1)
     except ValueError as e:
@@ -82,6 +83,7 @@ def make_error(
     stack_trace,
     invoke_id=None,
 ):
+    """Create error response."""
     result = {
         "errorMessage": error_message if error_message else "",
         "errorType": error_type if error_type else "",
@@ -92,6 +94,7 @@ def make_error(
 
 
 def replace_line_indentation(line, indent_char, new_indent_char):
+    """Replace line indentation characters."""
     ident_chars_count = 0
     for c in line:
         if c != indent_char:
@@ -104,6 +107,7 @@ def replace_line_indentation(line, indent_char, new_indent_char):
     _ERROR_FRAME_TYPE = _JSON_FRAME_TYPES[logging.ERROR]
 
     def log_error(error_result, log_sink):
+        """Log error in JSON format."""
         error_result = {
             "timestamp": time.strftime(
                 _DATETIME_FORMAT, logging.Formatter.converter(time.time())
@@ -119,6 +123,7 @@ def log_error(error_result, log_sink):
     _ERROR_FRAME_TYPE = _TEXT_FRAME_TYPES[logging.ERROR]
 
     def log_error(error_result, log_sink):
+        """Log error in text format."""
         error_description = "[ERROR]"
 
         error_result_type = error_result.get("errorType")
@@ -149,18 +154,19 @@ def log_error(error_result, log_sink):
 
 
 def handle_event_request(
-    lambda_runtime_client,
-    request_handler,
-    invoke_id,
-    event_body,
-    content_type,
-    client_context_json,
-    cognito_identity_json,
-    invoked_function_arn,
-    epoch_deadline_time_in_ms,
-    tenant_id,
-    log_sink,
-):
+    lambda_runtime_client: RuntimeClientProtocol,
+    request_handler: Any,
+    invoke_id: Optional[str],
+    event_body: Any,
+    content_type: Optional[str],
+    client_context_json: Optional[str],
+    cognito_identity_json: Optional[str],
+    invoked_function_arn: Optional[str],
+    epoch_deadline_time_in_ms: Optional[str],
+    tenant_id: Optional[str],
+    log_sink: LogSinkProtocol,
+) -> None:
+    """Handle Lambda event request."""
     error_result = None
     try:
         lambda_context = create_lambda_context(
@@ -201,7 +207,6 @@ def handle_event_request(
         )
 
     if error_result is not None:
-
         log_error(error_result, log_sink)
         lambda_runtime_client.post_invocation_error(
             invoke_id, to_json(error_result), to_json(xray_fault)
@@ -213,6 +218,7 @@ def handle_event_request(
 
 
 def parse_json_header(header, name):
+    """Parse JSON header."""
     try:
         return json.loads(header)
     except Exception as e:
@@ -224,13 +230,14 @@ def parse_json_header(header, name):
 
 
 def create_lambda_context(
-    client_context_json,
-    cognito_identity_json,
-    epoch_deadline_time_in_ms,
-    invoke_id,
-    invoked_function_arn,
-    tenant_id,
+    client_context_json: Optional[str],
+    cognito_identity_json: Optional[str],
+    epoch_deadline_time_in_ms: Optional[str],
+    invoke_id: Optional[str],
+    invoked_function_arn: Optional[str],
+    tenant_id: Optional[str],
 ):
+    """Create Lambda context object."""
     client_context = None
     if client_context_json:
         client_context = parse_json_header(client_context_json, "Client Context")
@@ -249,6 +256,7 @@ def create_lambda_context(
 
 
 def build_fault_result(exc_info, msg):
+    """Build fault result from exception info."""
     etype, value, tb = exc_info
     tb_tuples = extract_traceback(tb)
     for i in range(len(tb_tuples)):
@@ -264,6 +272,7 @@ def build_fault_result(exc_info, msg):
 
 
 def make_xray_fault(ex_type, ex_msg, working_dir, tb_tuples):
+    """Create X-Ray fault object."""
     stack = []
     files = set()
     for t in tb_tuples:
@@ -282,6 +291,7 @@ def make_xray_fault(ex_type, ex_msg, working_dir, tb_tuples):
 
 
 def extract_traceback(tb):
+    """Extract traceback information."""
     return [
         (frame.filename, frame.lineno, frame.name, frame.line)
         for frame in traceback.extract_tb(tb)
@@ -289,6 +299,7 @@ def extract_traceback(tb):
 
 
 def on_init_complete(lambda_runtime_client, log_sink):
+    """Handle initialization completion."""
     from . import lambda_runtime_hooks_runner
 
     try:
@@ -312,21 +323,29 @@ def on_init_complete(lambda_runtime_client, log_sink):
 
 
 class LambdaLoggerHandler(logging.Handler):
+    """Lambda logger handler."""
+
     def __init__(self, log_sink):
+        """Initialize logger handler."""
         logging.Handler.__init__(self)
         self.log_sink = log_sink
 
     def emit(self, record):
+        """Emit log record."""
         msg = self.format(record)
         self.log_sink.log(msg)
 
 
 class LambdaLoggerHandlerWithFrameType(logging.Handler):
+    """Lambda logger handler with frame type."""
+
     def __init__(self, log_sink):
+        """Initialize logger handler."""
         super().__init__()
         self.log_sink = log_sink
 
     def emit(self, record):
+        """Emit log record with frame type."""
         self.log_sink.log(
             self.format(record),
             frame_type=(
@@ -337,14 +356,20 @@ def emit(self, record):
 
 
 class LambdaLoggerFilter(logging.Filter):
+    """Lambda logger filter."""
+
     def filter(self, record):
+        """Filter log record."""
         record.aws_request_id = _GLOBAL_AWS_REQUEST_ID or ""
         record.tenant_id = _GLOBAL_TENANT_ID
         return True
 
 
 class Unbuffered(object):
+    """Unbuffered stream wrapper."""
+
     def __init__(self, stream):
+        """Initialize unbuffered stream."""
         self.stream = stream
 
     def __enter__(self):
@@ -357,16 +382,21 @@ def __getattr__(self, attr):
         return getattr(self.stream, attr)
 
     def write(self, msg):
+        """Write message to stream."""
         self.stream.write(msg)
         self.stream.flush()
 
     def writelines(self, msgs):
+        """Write multiple lines to stream."""
         self.stream.writelines(msgs)
         self.stream.flush()
 
 
-class StandardLogSink(object):
+class StandardLogSink:
+    """Standard log sink."""
+
     def __init__(self):
+        """Initialize standard log sink."""
         pass
 
     def __enter__(self):
@@ -375,18 +405,20 @@ def __enter__(self):
     def __exit__(self, exc_type, exc_value, exc_tb):
         pass
 
-    def log(self, msg, frame_type=None):
+    def log(self, msg: str, frame_type: Optional[bytes] = None) -> None:
+        """Log message to stdout."""
         sys.stdout.write(msg)
 
-    def log_error(self, message_lines):
+    def log_error(self, message_lines: List[str]) -> None:
+        """Log error message to stdout."""
         error_message = ERROR_LOG_LINE_TERMINATE.join(message_lines) + "\n"
         sys.stdout.write(error_message)
 
 
 class FramedTelemetryLogSink(object):
-    """
-    FramedTelemetryLogSink implements the logging contract between runtimes and the platform. It implements a simple
-    framing protocol so message boundaries can be determined. Each frame can be visualized as follows:
+    """FramedTelemetryLogSink implements the logging contract between runtimes and the platform.
+
+    It implements a simple framing protocol so message boundaries can be determined. Each frame can be visualized as follows:
      <pre>
     {@code
     +----------------------+------------------------+---------------------+-----------------------+
@@ -400,7 +432,9 @@ class FramedTelemetryLogSink(object):
     """
 
     def __init__(self, fd):
+        """Initialize framed telemetry log sink."""
         self.fd = int(fd)
+        self.file: Any = None
 
     def __enter__(self):
         self.file = os.fdopen(self.fd, "wb", 0)
@@ -409,7 +443,8 @@ def __enter__(self):
     def __exit__(self, exc_type, exc_value, exc_tb):
         self.file.close()
 
-    def log(self, msg, frame_type=None):
+    def log(self, msg: str, frame_type: Optional[bytes] = None) -> None:
+        """Log message with frame type."""
         encoded_msg = msg.encode("utf8")
 
         timestamp = int(time.time_ns() / 1000)  # UNIX timestamp in microseconds
@@ -421,7 +456,8 @@ def log(self, msg, frame_type=None):
         )
         self.file.write(log_msg)
 
-    def log_error(self, message_lines):
+    def log_error(self, message_lines: List[str]) -> None:
+        """Log error message."""
         error_message = "\n".join(message_lines)
         self.log(
             error_message,
@@ -430,6 +466,7 @@ def log_error(self, message_lines):
 
 
 def update_xray_env_variable(xray_trace_id):
+    """Update X-Ray trace ID environment variable."""
     if xray_trace_id is not None:
         os.environ["_X_AMZN_TRACE_ID"] = xray_trace_id
     else:
@@ -438,6 +475,7 @@ def update_xray_env_variable(xray_trace_id):
 
 
 def create_log_sink():
+    """Create appropriate log sink."""
     if "_LAMBDA_TELEMETRY_LOG_FD" in os.environ:
         fd = os.environ["_LAMBDA_TELEMETRY_LOG_FD"]
         del os.environ["_LAMBDA_TELEMETRY_LOG_FD"]
@@ -452,6 +490,7 @@ def create_log_sink():
 
 
 def _setup_logging(log_format, log_level, log_sink):
+    """Set up logging configuration."""
     logging.Formatter.converter = time.gmtime
     logger = logging.getLogger()
 
@@ -478,6 +517,7 @@ def _setup_logging(log_format, log_level, log_sink):
 
 
 def run(app_root, handler, lambda_runtime_api_addr):
+    """Run Lambda runtime."""
     sys.stdout = Unbuffered(sys.stdout)
     sys.stderr = Unbuffered(sys.stderr)
 
diff --git a/awslambdaric/interfaces.py b/awslambdaric/interfaces.py
new file mode 100644
index 0000000..aaecdc6
--- /dev/null
+++ b/awslambdaric/interfaces.py
@@ -0,0 +1,33 @@
+"""Protocol interfaces for AWS Lambda Runtime Interface Client."""
+
+from typing import Protocol, Any, Dict, Tuple, Optional, List
+
+
+class RuntimeClientProtocol(Protocol):
+    """Protocol for Lambda runtime client operations."""
+    
+    marshaller: "MarshallerProtocol"
+    
+    def wait_next_invocation(self) -> Any: ...
+    
+    def post_invocation_result(self, invoke_id: Optional[str], result_data: Any, content_type: str = "application/json") -> None: ...
+    
+    def post_invocation_error(self, invoke_id: Optional[str], error_response_data: str, xray_fault: str) -> None: ...
+    
+    def post_init_error(self, error_response_data: Dict[str, Any], error_type_override: Optional[str] = None) -> None: ...
+
+
+class MarshallerProtocol(Protocol):
+    """Protocol for request/response marshalling."""
+    
+    def unmarshal_request(self, request: Any, content_type: Optional[str] = "application/json") -> Any: ...
+    
+    def marshal_response(self, response: Any) -> Tuple[Any, str]: ...
+
+
+class LogSinkProtocol(Protocol):
+    """Protocol for logging operations."""
+    
+    def log(self, msg: str, frame_type: Optional[bytes] = None) -> None: ...
+    
+    def log_error(self, message_lines: List[str]) -> None: ...
\ No newline at end of file
diff --git a/awslambdaric/lambda_context.py b/awslambdaric/lambda_context.py
index e0a3363..ac701df 100644
--- a/awslambdaric/lambda_context.py
+++ b/awslambdaric/lambda_context.py
@@ -1,14 +1,15 @@
-"""
-Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-"""
+"""Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved."""
 
 import logging
 import os
 import sys
 import time
+from typing import Optional, Any
 
 
 class LambdaContext(object):
+    """Lambda context object."""
+
     def __init__(
         self,
         invoke_id,
@@ -18,6 +19,7 @@ def __init__(
         invoked_function_arn=None,
         tenant_id=None,
     ):
+        """Initialize Lambda context."""
         self.aws_request_id = invoke_id
         self.log_group_name = os.environ.get("AWS_LAMBDA_LOG_GROUP_NAME")
         self.log_stream_name = os.environ.get("AWS_LAMBDA_LOG_STREAM_NAME")
@@ -34,7 +36,7 @@ def __init__(
             )
 
         self.identity = make_obj_from_dict(CognitoIdentity, {})
-        if cognito_identity is not None:
+        if cognito_identity is not None and self.identity is not None:
             self.identity.cognito_identity_id = cognito_identity.get(
                 "cognitoIdentityId"
             )
@@ -45,11 +47,13 @@ def __init__(
         self._epoch_deadline_time_in_ms = epoch_deadline_time_in_ms
 
     def get_remaining_time_in_millis(self):
+        """Get remaining time in milliseconds."""
         epoch_now_in_ms = int(time.time() * 1000)
         delta_ms = self._epoch_deadline_time_in_ms - epoch_now_in_ms
         return delta_ms if delta_ms > 0 else 0
 
     def log(self, msg):
+        """Log a message."""
         for handler in logging.getLogger().handlers:
             if hasattr(handler, "log_sink"):
                 handler.log_sink.log(str(msg))
@@ -74,7 +78,13 @@ def __repr__(self):
 
 
 class CognitoIdentity(object):
+    """Cognito identity information."""
+
     __slots__ = ["cognito_identity_id", "cognito_identity_pool_id"]
+    
+    def __init__(self) -> None:
+        self.cognito_identity_id: Optional[str] = None
+        self.cognito_identity_pool_id: Optional[str] = None
 
     def __repr__(self):
         return (
@@ -86,6 +96,8 @@ def __repr__(self):
 
 
 class Client(object):
+    """Client information."""
+
     __slots__ = [
         "installation_id",
         "app_title",
@@ -93,6 +105,13 @@ class Client(object):
         "app_version_code",
         "app_package_name",
     ]
+    
+    def __init__(self) -> None:
+        self.installation_id: Optional[str] = None
+        self.app_title: Optional[str] = None
+        self.app_version_name: Optional[str] = None
+        self.app_version_code: Optional[str] = None
+        self.app_package_name: Optional[str] = None
 
     def __repr__(self):
         return (
@@ -107,7 +126,14 @@ def __repr__(self):
 
 
 class ClientContext(object):
+    """Client context information."""
+
     __slots__ = ["custom", "env", "client"]
+    
+    def __init__(self) -> None:
+        self.custom: Optional[Any] = None
+        self.env: Optional[Any] = None
+        self.client: Optional[Client] = None
 
     def __repr__(self):
         return (
@@ -120,6 +146,7 @@ def __repr__(self):
 
 
 def make_obj_from_dict(_class, _dict, fields=None):
+    """Create object from dictionary."""
     if _dict is None:
         return None
     obj = _class()
@@ -128,6 +155,7 @@ def make_obj_from_dict(_class, _dict, fields=None):
 
 
 def set_obj_from_dict(obj, _dict, fields=None):
+    """Set object attributes from dictionary."""
     if fields is None:
         fields = obj.__class__.__slots__
     for field in fields:
diff --git a/awslambdaric/lambda_literals.py b/awslambdaric/lambda_literals.py
index 2585b89..a2a0746 100644
--- a/awslambdaric/lambda_literals.py
+++ b/awslambdaric/lambda_literals.py
@@ -1,6 +1,4 @@
-"""
-Copyright 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-"""
+"""Copyright 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved."""
 
 lambda_warning = "LAMBDA_WARNING"
 
diff --git a/awslambdaric/lambda_runtime_client.py b/awslambdaric/lambda_runtime_client.py
index ba4ad92..3d5cf09 100644
--- a/awslambdaric/lambda_runtime_client.py
+++ b/awslambdaric/lambda_runtime_client.py
@@ -1,11 +1,11 @@
-"""
-Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-"""
+"""Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved."""
 
 import sys
+from typing import Any, Dict, Optional
 from awslambdaric import __version__
 from .lambda_runtime_exception import FaultException
 from .lambda_runtime_marshaller import to_json
+from .interfaces import MarshallerProtocol, RuntimeClientProtocol
 
 ERROR_TYPE_HEADER = "Lambda-Runtime-Function-Error-Type"
 
@@ -18,26 +18,41 @@ def _user_agent():
     return f"aws-lambda-python/{py_version}-{pkg_version}"
 
 
-try:
-    import runtime_client
-
-    runtime_client.initialize_client(_user_agent())
-except ImportError:
-    runtime_client = None
+# Import native extension
+import awslambdaric_native as runtime_client
+runtime_client.initialize_client(_user_agent())
 
 from .lambda_runtime_marshaller import LambdaMarshaller
 
 
-class InvocationRequest(object):
-    def __init__(self, **kwds):
+class InvocationRequest:
+    """Lambda invocation request."""
+
+    def __init__(self, **kwds: Any) -> None:
+        """Initialize invocation request."""
+        self.invoke_id: Optional[str] = kwds.get('invoke_id')
+        self.x_amzn_trace_id: Optional[str] = kwds.get('x_amzn_trace_id')
+        self.invoked_function_arn: Optional[str] = kwds.get('invoked_function_arn')
+        self.deadline_time_in_ms: Optional[str] = kwds.get('deadline_time_in_ms')
+        self.client_context: Optional[str] = kwds.get('client_context')
+        self.cognito_identity: Optional[str] = kwds.get('cognito_identity')
+        self.tenant_id: Optional[str] = kwds.get('tenant_id')
+        self.content_type: Optional[str] = kwds.get('content_type')
+        self.event_body: Any = kwds.get('event_body')
         self.__dict__.update(kwds)
 
-    def __eq__(self, other):
+    def __eq__(self, other: object) -> bool:
+        """Check equality."""
+        if not isinstance(other, InvocationRequest):
+            return False
         return self.__dict__ == other.__dict__
 
 
 class LambdaRuntimeClientError(Exception):
+    """Lambda runtime client error."""
+
     def __init__(self, endpoint, response_code, response_body):
+        """Initialize runtime client error."""
         self.endpoint = endpoint
         self.response_code = response_code
         self.response_body = response_body
@@ -46,13 +61,16 @@ def __init__(self, endpoint, response_code, response_body):
         )
 
 
-class LambdaRuntimeClient(object):
-    marshaller = LambdaMarshaller()
+class LambdaRuntimeClient(RuntimeClientProtocol):
+    """Lambda runtime client."""
+
+    marshaller: MarshallerProtocol = LambdaMarshaller()
     """marshaller is a class attribute that determines the unmarshalling and marshalling logic of a function's event
     and response. It allows for function authors to override the the default implementation, LambdaMarshaller which
     unmarshals and marshals JSON, to an instance of a class that implements the same interface."""
 
     def __init__(self, lambda_runtime_address, use_thread_for_polling_next=False):
+        """Initialize runtime client."""
         self.lambda_runtime_address = lambda_runtime_address
         self.use_thread_for_polling_next = use_thread_for_polling_next
         if self.use_thread_for_polling_next:
@@ -65,6 +83,7 @@ def __init__(self, lambda_runtime_address, use_thread_for_polling_next=False):
     def call_rapid(
         self, http_method, endpoint, expected_http_code, payload=None, headers=None
     ):
+        """Call RAPID endpoint."""
         # These imports are heavy-weight. They implicitly trigger `import ssl, hashlib`.
         # Importing them lazily to speed up critical path of a common case.
         import http.client
@@ -83,7 +102,8 @@ def call_rapid(
         if response.code != expected_http_code:
             raise LambdaRuntimeClientError(endpoint, response.code, response_body)
 
-    def post_init_error(self, error_response_data, error_type_override=None):
+    def post_init_error(self, error_response_data: Dict[str, Any], error_type_override: Optional[str] = None) -> None:
+        """Post initialization error."""
         import http
 
         endpoint = "/2018-06-01/runtime/init/error"
@@ -99,12 +119,14 @@ def post_init_error(self, error_response_data, error_type_override=None):
         )
 
     def restore_next(self):
+        """Restore next invocation."""
         import http
 
         endpoint = "/2018-06-01/runtime/restore/next"
         self.call_rapid("GET", endpoint, http.HTTPStatus.OK)
 
     def report_restore_error(self, restore_error_data):
+        """Report restore error."""
         import http
 
         endpoint = "/2018-06-01/runtime/restore/error"
@@ -114,6 +136,7 @@ def report_restore_error(self, restore_error_data):
         )
 
     def wait_next_invocation(self):
+        """Wait for next invocation."""
         # Calling runtime_client.next() from a separate thread unblocks the main thread,
         # which can then process signals.
         if self.use_thread_for_polling_next:
@@ -130,6 +153,7 @@ def wait_next_invocation(self):
                 )
         else:
             response_body, headers = runtime_client.next()
+            
         return InvocationRequest(
             invoke_id=headers.get("Lambda-Runtime-Aws-Request-Id"),
             x_amzn_trace_id=headers.get("Lambda-Runtime-Trace-Id"),
@@ -143,8 +167,9 @@ def wait_next_invocation(self):
         )
 
     def post_invocation_result(
-        self, invoke_id, result_data, content_type="application/json"
-    ):
+        self, invoke_id: Optional[str], result_data: Any, content_type: str = "application/json"
+    ) -> None:
+        """Post invocation result."""
         runtime_client.post_invocation_result(
             invoke_id,
             (
@@ -155,7 +180,8 @@ def post_invocation_result(
             content_type,
         )
 
-    def post_invocation_error(self, invoke_id, error_response_data, xray_fault):
+    def post_invocation_error(self, invoke_id: Optional[str], error_response_data: str, xray_fault: str) -> None:
+        """Post invocation error."""
         max_header_size = 1024 * 1024  # 1MiB
         xray_fault = xray_fault if len(xray_fault.encode()) < max_header_size else ""
         runtime_client.post_error(invoke_id, error_response_data, xray_fault)
diff --git a/awslambdaric/lambda_runtime_exception.py b/awslambdaric/lambda_runtime_exception.py
index 3ea5b29..3c2e41a 100644
--- a/awslambdaric/lambda_runtime_exception.py
+++ b/awslambdaric/lambda_runtime_exception.py
@@ -1,9 +1,9 @@
-"""
-Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-"""
+"""Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved."""
 
 
 class FaultException(Exception):
+    """Exception class for Lambda runtime faults."""
+
     MARSHAL_ERROR = "Runtime.MarshalError"
     UNMARSHAL_ERROR = "Runtime.UnmarshalError"
     USER_CODE_SYNTAX_ERROR = "Runtime.UserCodeSyntaxError"
@@ -17,6 +17,7 @@ class FaultException(Exception):
     LAMBDA_RUNTIME_CLIENT_ERROR = "Runtime.LambdaRuntimeClientError"
 
     def __init__(self, exception_type, msg, trace=None):
+        """Initialize FaultException."""
         self.msg = msg
         self.exception_type = exception_type
         self.trace = trace
diff --git a/awslambdaric/lambda_runtime_hooks_runner.py b/awslambdaric/lambda_runtime_hooks_runner.py
index 8aee181..ab67e63 100644
--- a/awslambdaric/lambda_runtime_hooks_runner.py
+++ b/awslambdaric/lambda_runtime_hooks_runner.py
@@ -1,10 +1,14 @@
-# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
-# SPDX-License-Identifier: Apache-2.0
+"""Lambda runtime hooks runner.
+
+Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+SPDX-License-Identifier: Apache-2.0
+"""
 
 from snapshot_restore_py import get_before_snapshot, get_after_restore
 
 
 def run_before_snapshot():
+    """Run before snapshot hooks."""
     before_snapshot_callables = get_before_snapshot()
     while before_snapshot_callables:
         # Using pop as before checkpoint callables are executed in the reverse order of their registration
@@ -13,6 +17,7 @@ def run_before_snapshot():
 
 
 def run_after_restore():
+    """Run after restore hooks."""
     after_restore_callables = get_after_restore()
     for func, args, kwargs in after_restore_callables:
         func(*args, **kwargs)
diff --git a/awslambdaric/lambda_runtime_log_utils.py b/awslambdaric/lambda_runtime_log_utils.py
index 9ddbcfb..93a1d63 100644
--- a/awslambdaric/lambda_runtime_log_utils.py
+++ b/awslambdaric/lambda_runtime_log_utils.py
@@ -1,6 +1,4 @@
-"""
-Copyright 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-"""
+"""Copyright 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved."""
 
 import json
 import logging
@@ -36,11 +34,14 @@
 
 
 class LogFormat(IntEnum):
+    """Log format enumeration."""
+
     JSON = 0b0
     TEXT = 0b1
 
     @classmethod
     def from_str(cls, value: str):
+        """Convert string to LogFormat."""
         if value and value.upper() == "JSON":
             return cls.JSON.value
         return cls.TEXT.value
@@ -77,7 +78,10 @@ def _format_log_level(record: logging.LogRecord) -> int:
 
 
 class JsonFormatter(logging.Formatter):
+    """JSON formatter for Lambda logs."""
+
     def __init__(self):
+        """Initialize the JSON formatter."""
         super().__init__(datefmt=_DATETIME_FORMAT)
 
     @staticmethod
@@ -108,6 +112,7 @@ def __format_location(record: logging.LogRecord):
         return f"{record.pathname}:{record.funcName}:{record.lineno}"
 
     def format(self, record: logging.LogRecord) -> str:
+        """Format log record as JSON."""
         record.levelno = _format_log_level(record)
         record.levelname = logging.getLevelName(record.levelno)
         record._frame_type = _JSON_FRAME_TYPES.get(
diff --git a/awslambdaric/lambda_runtime_marshaller.py b/awslambdaric/lambda_runtime_marshaller.py
index 4256066..1a0cbdd 100644
--- a/awslambdaric/lambda_runtime_marshaller.py
+++ b/awslambdaric/lambda_runtime_marshaller.py
@@ -1,20 +1,23 @@
-"""
-Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-"""
+"""Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved."""
 
 import decimal
 import math
 import os
+from typing import Any, Tuple, Optional
 import simplejson as json
 
 from .lambda_runtime_exception import FaultException
+from .interfaces import MarshallerProtocol
 
 
 # simplejson's Decimal encoding allows '-NaN' as an output, which is a parse error for json.loads
 # to get the good parts of Decimal support, we'll special-case NaN decimals and otherwise duplicate the encoding for decimals the same way simplejson does
 # We also set 'ensure_ascii=False' so that the encoded json contains unicode characters instead of unicode escape sequences
 class Encoder(json.JSONEncoder):
+    """Custom JSON encoder for Lambda responses."""
+
     def __init__(self):
+        """Initialize the encoder."""
         if os.environ.get("AWS_EXECUTION_ENV") in {
             "AWS_Lambda_python3.12",
             "AWS_Lambda_python3.13",
@@ -23,7 +26,8 @@ def __init__(self):
         else:
             super().__init__(use_decimal=False, allow_nan=True)
 
-    def default(self, obj):
+    def default(self, obj: Any) -> Any:
+        """Handle special object types during encoding."""
         if isinstance(obj, decimal.Decimal):
             if obj.is_nan():
                 return math.nan
@@ -32,14 +36,19 @@ def default(self, obj):
 
 
 def to_json(obj):
+    """Convert object to JSON string."""
     return Encoder().encode(obj)
 
 
-class LambdaMarshaller:
+class LambdaMarshaller(MarshallerProtocol):
+    """Marshaller for Lambda requests and responses."""
+
     def __init__(self):
+        """Initialize the marshaller."""
         self.jsonEncoder = Encoder()
 
-    def unmarshal_request(self, request, content_type="application/json"):
+    def unmarshal_request(self, request: Any, content_type: Optional[str] = "application/json") -> Any:
+        """Unmarshal incoming request."""
         if content_type != "application/json":
             return request
         try:
@@ -51,7 +60,8 @@ def unmarshal_request(self, request, content_type="application/json"):
                 None,
             )
 
-    def marshal_response(self, response):
+    def marshal_response(self, response: Any) -> Tuple[Any, str]:
+        """Marshal response for Lambda."""
         if isinstance(response, bytes):
             return response, "application/unknown"
 
diff --git a/awslambdaric/runtime_client.cpp b/awslambdaric/runtime_client.cpp
deleted file mode 100644
index 7fb2e95..0000000
--- a/awslambdaric/runtime_client.cpp
+++ /dev/null
@@ -1,150 +0,0 @@
-/* Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved. */
-
-#include <Python.h>
-#include <aws/lambda-runtime/runtime.h>
-#include <aws/lambda-runtime/version.h>
-#include <chrono>
-
-#define NULL_IF_EMPTY(v) (((v) == NULL || (v)[0] == 0) ? NULL : (v))
-
-static const std::string ENDPOINT(getenv("AWS_LAMBDA_RUNTIME_API") ? getenv("AWS_LAMBDA_RUNTIME_API") : "127.0.0.1:9001");
-static aws::lambda_runtime::runtime *CLIENT;
-
-static PyObject *method_initialize_client(PyObject *self, PyObject *args) {
-    char *user_agent_arg;
-    if (!PyArg_ParseTuple(args, "s", &user_agent_arg)) {
-        PyErr_SetString(PyExc_RuntimeError, "Wrong arguments");
-        return NULL;
-    }
-
-    const std::string user_agent = std::string(user_agent_arg);
-
-    CLIENT = new aws::lambda_runtime::runtime(ENDPOINT, user_agent);
-    Py_INCREF(Py_None);
-    return Py_None;
-}
-
-static PyObject *method_next(PyObject *self) {
-    aws::lambda_runtime::invocation_request response;
-
-    // Release GIL and save thread state
-    // ref: https://docs.python.org/3/c-api/init.html#thread-state-and-the-global-interpreter-lock
-    PyThreadState *_save;
-    _save = PyEval_SaveThread();
-
-    auto outcome = CLIENT->get_next();
-    if (!outcome.is_success()) {
-        // Reacquire GIL before exiting
-        PyEval_RestoreThread(_save);
-        PyErr_SetString(PyExc_RuntimeError, "Failed to get next");
-        return NULL;
-    }
-
-    response = outcome.get_result();
-    // Reacquire GIL before constructing return object
-    PyEval_RestoreThread(_save);
-
-    auto payload = response.payload;
-    auto request_id = response.request_id.c_str();
-    auto trace_id = response.xray_trace_id.c_str();
-    auto function_arn = response.function_arn.c_str();
-    auto deadline = std::chrono::duration_cast<std::chrono::milliseconds>(response.deadline.time_since_epoch()).count();
-    auto client_context = response.client_context.c_str();
-    auto content_type = response.content_type.c_str();
-    auto cognito_id = response.cognito_identity.c_str();
-    auto tenant_id = response.tenant_id.c_str();
-
-    PyObject *payload_bytes = PyBytes_FromStringAndSize(payload.c_str(), payload.length());
-    PyObject *result = Py_BuildValue("(O,{s:s,s:s,s:s,s:l,s:s,s:s,s:s,s:s})",
-                         payload_bytes,  //Py_BuildValue() increments reference counter
-                         "Lambda-Runtime-Aws-Request-Id", request_id,
-                         "Lambda-Runtime-Trace-Id", NULL_IF_EMPTY(trace_id),
-                         "Lambda-Runtime-Invoked-Function-Arn", function_arn,
-                         "Lambda-Runtime-Deadline-Ms", deadline,
-                         "Lambda-Runtime-Client-Context", NULL_IF_EMPTY(client_context),
-                         "Content-Type", NULL_IF_EMPTY(content_type),
-                         "Lambda-Runtime-Cognito-Identity", NULL_IF_EMPTY(cognito_id),
-                         "Lambda-Runtime-Aws-Tenant-Id", NULL_IF_EMPTY(tenant_id)
-    );
-
-    Py_XDECREF(payload_bytes);
-    return result;
-}
-
-static PyObject *method_post_invocation_result(PyObject *self, PyObject *args) {
-    if (CLIENT == nullptr) {
-        PyErr_SetString(PyExc_RuntimeError, "Client not yet initalized");
-        return NULL;
-    }
-
-    PyObject *invocation_response;
-    Py_ssize_t length;
-    char *request_id, *content_type, *response_as_c_string;
-
-    if (!PyArg_ParseTuple(args, "sSs", &request_id, &invocation_response, &content_type)) {
-        PyErr_SetString(PyExc_RuntimeError, "Wrong arguments");
-        return NULL;
-    }
-
-    length = PyBytes_Size(invocation_response);
-    response_as_c_string = PyBytes_AsString(invocation_response);
-    std::string response_string(response_as_c_string, response_as_c_string + length);
-
-    auto response = aws::lambda_runtime::invocation_response::success(response_string, content_type);
-    auto outcome = CLIENT->post_success(request_id, response);
-    if (!outcome.is_success()) {
-        PyErr_SetString(PyExc_RuntimeError, "Failed to post invocation response");
-        return NULL;
-    }
-
-    Py_INCREF(Py_None);
-    return Py_None;
-}
-
-static PyObject *method_post_error(PyObject *self, PyObject *args) {
-    if (CLIENT == nullptr) {
-        PyErr_SetString(PyExc_RuntimeError, "Client not yet initalized");
-        return NULL;
-    }
-
-    char *request_id, *response_string, *xray_fault;
-
-    if (!PyArg_ParseTuple(args, "sss", &request_id, &response_string, &xray_fault)) {
-        PyErr_SetString(PyExc_RuntimeError, "Wrong arguments");
-        return NULL;
-    }
-
-    auto response = aws::lambda_runtime::invocation_response(response_string, "application/json", false, xray_fault);
-    auto outcome = CLIENT->post_failure(request_id, response);
-    if (!outcome.is_success()) {
-        PyErr_SetString(PyExc_RuntimeError, "Failed to post invocation error");
-        return NULL;
-    }
-
-    Py_INCREF(Py_None);
-    return Py_None;
-}
-
-static PyMethodDef Runtime_Methods[] = {
-        {"initialize_client",      method_initialize_client,      METH_VARARGS, NULL},
-        {"next",                   (PyCFunction) method_next,     METH_NOARGS,  NULL},
-        {"post_invocation_result", method_post_invocation_result, METH_VARARGS, NULL},
-        {"post_error",             method_post_error,             METH_VARARGS, NULL},
-        {NULL,                     NULL,                          0,            NULL}
-};
-
-static struct PyModuleDef runtime_client = {
-        PyModuleDef_HEAD_INIT,
-        "runtime",
-        NULL,
-        -1,
-        Runtime_Methods,
-        NULL,
-        NULL,
-        NULL,
-        NULL
-};
-
-PyMODINIT_FUNC PyInit_runtime_client(void) {
-    return PyModule_Create(&runtime_client);
-}
diff --git a/poetry.lock b/poetry.lock
new file mode 100644
index 0000000..0758dfe
--- /dev/null
+++ b/poetry.lock
@@ -0,0 +1,514 @@
+# This file is automatically @generated by Poetry 2.1.3 and should not be changed by hand.
+
+[[package]]
+name = "colorama"
+version = "0.4.6"
+description = "Cross-platform colored terminal text."
+optional = false
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+    {file = "tomli-2.2.1-cp312-cp312-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:4e340144ad7ae1533cb897d406382b4b6fede8890a03738ff1683af800d54192"},
+    {file = "tomli-2.2.1-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:db2b95f9de79181805df90bedc5a5ab4c165e6ec3fe99f970d0e302f384ad222"},
+    {file = "tomli-2.2.1-cp312-cp312-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:40741994320b232529c802f8bc86da4e1aa9f413db394617b9a256ae0f9a7f77"},
+    {file = "tomli-2.2.1-cp312-cp312-musllinux_1_2_aarch64.whl", hash = "sha256:400e720fe168c0f8521520190686ef8ef033fb19fc493da09779e592861b78c6"},
+    {file = "tomli-2.2.1-cp312-cp312-musllinux_1_2_i686.whl", hash = "sha256:02abe224de6ae62c19f090f68da4e27b10af2b93213d36cf44e6e1c5abd19fdd"},
+    {file = "tomli-2.2.1-cp312-cp312-musllinux_1_2_x86_64.whl", hash = "sha256:b82ebccc8c8a36f2094e969560a1b836758481f3dc360ce9a3277c65f374285e"},
+    {file = "tomli-2.2.1-cp312-cp312-win32.whl", hash = "sha256:889f80ef92701b9dbb224e49ec87c645ce5df3fa2cc548664eb8a25e03127a98"},
+    {file = "tomli-2.2.1-cp312-cp312-win_amd64.whl", hash = "sha256:7fc04e92e1d624a4a63c76474610238576942d6b8950a2d7f908a340494e67e4"},
+    {file = "tomli-2.2.1-cp313-cp313-macosx_10_13_x86_64.whl", hash = "sha256:f4039b9cbc3048b2416cc57ab3bda989a6fcf9b36cf8937f01a6e731b64f80d7"},
+    {file = "tomli-2.2.1-cp313-cp313-macosx_11_0_arm64.whl", hash = "sha256:286f0ca2ffeeb5b9bd4fcc8d6c330534323ec51b2f52da063b11c502da16f30c"},
+    {file = "tomli-2.2.1-cp313-cp313-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:a92ef1a44547e894e2a17d24e7557a5e85a9e1d0048b0b5e7541f76c5032cb13"},
+    {file = "tomli-2.2.1-cp313-cp313-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:9316dc65bed1684c9a98ee68759ceaed29d229e985297003e494aa825ebb0281"},
+    {file = "tomli-2.2.1-cp313-cp313-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:e85e99945e688e32d5a35c1ff38ed0b3f41f43fad8df0bdf79f72b2ba7bc5272"},
+    {file = "tomli-2.2.1-cp313-cp313-musllinux_1_2_aarch64.whl", hash = "sha256:ac065718db92ca818f8d6141b5f66369833d4a80a9d74435a268c52bdfa73140"},
+    {file = "tomli-2.2.1-cp313-cp313-musllinux_1_2_i686.whl", hash = "sha256:d920f33822747519673ee656a4b6ac33e382eca9d331c87770faa3eef562aeb2"},
+    {file = "tomli-2.2.1-cp313-cp313-musllinux_1_2_x86_64.whl", hash = "sha256:a198f10c4d1b1375d7687bc25294306e551bf1abfa4eace6650070a5c1ae2744"},
+    {file = "tomli-2.2.1-cp313-cp313-win32.whl", hash = "sha256:d3f5614314d758649ab2ab3a62d4f2004c825922f9e370b29416484086b264ec"},
+    {file = "tomli-2.2.1-cp313-cp313-win_amd64.whl", hash = "sha256:a38aa0308e754b0e3c67e344754dff64999ff9b513e691d0e786265c93583c69"},
+    {file = "tomli-2.2.1-py3-none-any.whl", hash = "sha256:cb55c73c5f4408779d0cf3eef9f762b9c9f147a77de7b258bef0a5628adc85cc"},
+    {file = "tomli-2.2.1.tar.gz", hash = "sha256:cd45e1dc79c835ce60f7404ec8119f2eb06d38b1deba146f07ced3bbc44505ff"},
+]
+
+[[package]]
+name = "typing-extensions"
+version = "4.14.1"
+description = "Backported and Experimental Type Hints for Python 3.9+"
+optional = false
+python-versions = ">=3.9"
+groups = ["dev"]
+markers = "python_version < \"3.11\""
+files = [
+    {file = "typing_extensions-4.14.1-py3-none-any.whl", hash = "sha256:d1e1e3b58374dc93031d6eda2420a48ea44a36c2b4766a4fdeb3710755731d76"},
+    {file = "typing_extensions-4.14.1.tar.gz", hash = "sha256:38b39f4aeeab64884ce9f74c94263ef78f3c22467c8724005483154c26648d36"},
+]
+
+[metadata]
+lock-version = "2.1"
+python-versions = ">=3.9"
+content-hash = "fb2951082007675c7b94eaf035984e23a6651bf6028874b515bdd8baa0ef98c1"
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..531f16d
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,70 @@
+[tool.poetry]
+name = "awslambdaric"
+version = "3.0.2"
+description = "AWS Lambda Runtime Interface Client for Python"
+authors = ["Amazon Web Services"]
+license = "Apache-2.0"
+readme = "README.md"
+packages = [{ include = "awslambdaric" }]
+
+[tool.poetry.dependencies]
+python = ">=3.9"
+simplejson = ">=3.20.1"
+snapshot-restore-py = ">=1.0.0"
+
+[tool.poetry.group.dev.dependencies]
+coverage = ">=4.4.0"
+pytest = ">=3.0.7"
+mock = ">=2.0.0"
+parameterized = ">=0.9.0"
+ruff = "^0.1.0"
+poethepoet = "^0.24.0"
+pyrefly = "^0.26.0"
+
+[tool.poe.tasks]
+init = "poetry install"
+test = "pytest tests"
+lint = "ruff check awslambdaric/ tests/"
+format = "ruff format awslambdaric/ tests/"
+clean = { shell = "rm -rf build dist *.egg-info" }
+build = ["clean", { cmd = "python setup.py sdist bdist_wheel" }]
+build-container = { shell = "./scripts/build-container.sh" }
+test-rie = { shell = "./scripts/test-rie.sh" }
+check-security = "ruff check --select S awslambdaric/"
+check-format = "ruff format --check awslambdaric/ tests/"
+check-docstr = "ruff check --select D --ignore D105 awslambdaric/"
+type-check = "pyrefly check"
+test-smoke = { shell = "CODEBUILD_IMAGE_TAG=codebuild-agent tests/integration/codebuild-local/test_one.sh tests/integration/codebuild/buildspec.os.alpine.yml alpine 3.15 3.9" }
+test-integ = { shell = "CODEBUILD_IMAGE_TAG=codebuild-agent DISTRO=\"$DISTRO\" tests/integration/codebuild-local/test_all.sh tests/integration/codebuild/." }
+setup-codebuild-agent = { shell = "docker build -t codebuild-agent - < tests/integration/codebuild-local/Dockerfile.agent" }
+
+# Composite tasks
+dev = ["init", "test"]
+pr = ["init", "check-format", "check-security", "dev"]
+
+[build-system]
+requires = ["poetry-core>=2.0.0,<3.0.0", "setuptools>=68", "wheel"]
+build-backend = "poetry.core.masonry.api"
+
+# Ruff configuration
+[tool.ruff]
+target-version = "py39"
+line-length = 88
+
+[tool.ruff.lint]
+select = [
+    "E",   # pycodestyle errors
+    "W",   # pycodestyle warnings  
+    "F",   # pyflakes
+    "I",   # isort
+    "UP",  # pyupgrade
+    "C90", # mccabe complexity
+    "S",   # flake8-bandit security checks
+]
+
+[tool.pyrefly]
+project-includes = ["**/*"]
+project-excludes = ["**/*venv/**/*"]
+
+[tool.ruff.format]
+quote-style = "double"
diff --git a/requirements/base.txt b/requirements/base.txt
deleted file mode 100644
index 4bb251e..0000000
--- a/requirements/base.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-simplejson>=3.20.1
-snapshot-restore-py>=1.0.0
diff --git a/requirements/dev.txt b/requirements/dev.txt
deleted file mode 100644
index 68377ce..0000000
--- a/requirements/dev.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-coverage>=4.4.0
-flake8>=3.3.0
-tox>=2.2.1
-pytest-cov>=2.4.0
-pylint>=1.7.2
-black>=20.8b0
-bandit>=1.6.2
-
-# Test requirements
-pytest>=3.0.7
-mock>=2.0.0
-parameterized>=0.9.0
\ No newline at end of file
diff --git a/scripts/build-container.sh b/scripts/build-container.sh
new file mode 100755
index 0000000..2b7c9c6
--- /dev/null
+++ b/scripts/build-container.sh
@@ -0,0 +1,25 @@
+#!/bin/bash
+set -euo pipefail
+
+TAG=${TAG:-latest}
+PYTHON_VERSION=${PYTHON_VERSION:-3.9}
+
+echo "Building awslambdaric wheel for Python ${PYTHON_VERSION}..."
+
+echo "Building wheel in container..."
+docker build \
+    --build-arg PYTHON_VERSION="${PYTHON_VERSION}" \
+    -f Dockerfile.build \
+    -t "awslambdaric-builder:${TAG}" \
+    .
+
+echo "Extracting built wheel..."
+mkdir -p build-artifacts
+
+docker run --rm -v $(pwd)/build-artifacts:/output awslambdaric-builder:${TAG} /bin/sh -c "
+    cp /home/build/dist/*.whl /output/
+    echo 'Wheel copied to build-artifacts/'
+    ls -la /output/
+"
+
+echo "Build complete! Wheel is available in build-artifacts/"
\ No newline at end of file
diff --git a/scripts/test-rie.sh b/scripts/test-rie.sh
new file mode 100755
index 0000000..4544870
--- /dev/null
+++ b/scripts/test-rie.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+set -euo pipefail
+
+DOCKERFILE="Dockerfile.rie"
+
+echo "Starting RIE test setup..."
+
+# Check if build artifacts exist
+if [ ! -d "build-artifacts" ] || [ -z "$(ls -A build-artifacts/*.whl 2>/dev/null)" ]; then
+    echo "No build artifacts found. Please run 'poetry run poe build-container' first."
+    exit 1
+fi
+
+echo "Building test Docker image..."
+docker build \
+    -f "${DOCKERFILE}" \
+    -t awslambdaric-rie-test .
+
+echo "Starting test container on port 9000..."
+echo ""
+echo "Test with:"
+echo "curl -XPOST \"http://localhost:9000/2015-03-31/functions/function/invocations\" -d '{\"message\":\"test\"}'"
+echo ""
+
+docker run -p 9000:8080 \
+    --rm awslambdaric-rie-test
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 2bf28ef..3ce5c62 100644
--- a/setup.py
+++ b/setup.py
@@ -1,98 +1,44 @@
-"""
-Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-"""
-
-import io
-import os
-import platform
-from subprocess import check_call, check_output
-from setuptools import Extension, find_packages, setup
-from awslambdaric import __version__
-
-
-def get_curl_extra_linker_flags():
-    # We do not want to build the dependencies during packaging
-    if platform.system() != "Linux" or os.getenv("BUILD") == "true":
-        return []
-
-    # Build the dependencies
-    check_call(["./scripts/preinstall.sh"])
-
-    # call curl-config to get the required linker flags
-    cmd = ["./deps/artifacts/bin/curl-config", "--static-libs"]
-    curl_config = check_output(cmd).decode("utf-8").replace("\n", "")
-
-    # It is expected that the result of the curl-config call is similar to
-    # "/tmp/pip-req-build-g9dlug7g/deps/artifacts/lib/libcurl.a -lidn2"
-    # we want to return just the extra flags
-    flags = curl_config.split(" ")[1:]
-
-    return flags
-
-
-def get_runtime_client_extension():
-    if platform.system() != "Linux" and os.getenv("BUILD") != "true":
-        print(
-            "The native runtime_client only builds on Linux. Skipping its compilation."
-        )
-        return []
-
-    runtime_client = Extension(
-        "runtime_client",
-        ["awslambdaric/runtime_client.cpp"],
-        extra_compile_args=["--std=c++11"],
-        library_dirs=["deps/artifacts/lib", "deps/artifacts/lib64"],
-        libraries=["aws-lambda-runtime", "curl"],
-        extra_link_args=get_curl_extra_linker_flags(),
-        include_dirs=["deps/artifacts/include"],
-    )
-
-    return [runtime_client]
-
-
-def read(*filenames, **kwargs):
-    encoding = kwargs.get("encoding", "utf-8")
-    sep = kwargs.get("sep", os.linesep)
-    buf = []
-    for filename in filenames:
-        with io.open(filename, encoding=encoding) as f:
-            buf.append(f.read())
-    return sep.join(buf)
-
-
-def read_requirements(req="base.txt"):
-    content = read(os.path.join("requirements", req))
-    return [
-        line for line in content.split(os.linesep) if not line.strip().startswith("#")
-    ]
-
+import sys
+from setuptools import setup, find_packages
+
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    try:
+        import tomli as tomllib
+    except ImportError:
+        import subprocess
+        subprocess.check_call([sys.executable, "-m", "pip", "install", "tomli"])
+        import tomli as tomllib
+
+def get_metadata():
+    with open("pyproject.toml", "rb") as f:
+        pyproject = tomllib.load(f)
+    
+    poetry_config = pyproject["tool"]["poetry"]
+    return {
+        "name": poetry_config["name"],
+        "version": poetry_config["version"],
+        "description": poetry_config["description"],
+        "author": poetry_config["authors"][0] if poetry_config["authors"] else "",
+        "license": poetry_config["license"],
+        "python_requires": poetry_config["dependencies"]["python"],
+        "install_requires": [
+            f"{pkg}{version}" if isinstance(version, str) and not version.startswith("^") and not version.startswith("~") else f"{pkg}>={version[1:] if isinstance(version, str) else version}"
+            for pkg, version in poetry_config["dependencies"].items()
+            if pkg != "python" and not isinstance(version, dict)
+        ]
+    }
+
+metadata = get_metadata()
 
 setup(
-    name="awslambdaric",
-    version=__version__,
-    author="Amazon Web Services",
-    description="AWS Lambda Runtime Interface Client for Python",
-    long_description=read("README.md"),
-    long_description_content_type="text/markdown",
-    url="https://github.com/aws/aws-lambda-python-runtime-interface-client",
-    packages=find_packages(
-        exclude=("tests", "tests.*", "docs", "examples", "versions")
-    ),
-    install_requires=read_requirements("base.txt"),
-    classifiers=[
-        "Development Status :: 5 - Production/Stable",
-        "Intended Audience :: Developers",
-        "Natural Language :: English",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.9",
-        "Programming Language :: Python :: 3.10",
-        "Programming Language :: Python :: 3.11",
-        "Programming Language :: Python :: 3.12",
-        "Programming Language :: Python :: 3.13",
-        "License :: OSI Approved :: Apache Software License",
-        "Operating System :: OS Independent",
-    ],
-    python_requires=">=3.9",
-    ext_modules=get_runtime_client_extension(),
-    test_suite="tests",
+    name=metadata["name"],
+    version=metadata["version"],
+    description=metadata["description"],
+    author=metadata["author"],
+    license=metadata["license"],
+    packages=find_packages(),
+    python_requires=metadata["python_requires"],
+    install_requires=metadata["install_requires"],
 )
diff --git a/tests/integration/docker/Dockerfile.echo.alpine b/tests/integration/docker/Dockerfile.echo.alpine
index f6790fa..e4d6010 100644
--- a/tests/integration/docker/Dockerfile.echo.alpine
+++ b/tests/integration/docker/Dockerfile.echo.alpine
@@ -22,7 +22,8 @@ RUN apk add --no-cache \
     elfutils-dev \
     make \
     cmake \
-    libcurl
+    libcurl \
+    curl
 
 # Include global args in this stage of the build
 ARG RIC_BUILD_DIR="/home/build/"
@@ -32,8 +33,13 @@ RUN mkdir -p ${RIC_BUILD_DIR}
 WORKDIR ${RIC_BUILD_DIR}
 COPY . .
 RUN pip3 install setuptools
-RUN make init build test && \
-    mv ./dist/awslambdaric-*.tar.gz ./dist/awslambdaric-test.tar.gz
+# Install Poetry
+RUN curl -sSL https://install.python-poetry.org | python3 - && \
+    ln -s /root/.local/bin/poetry /usr/local/bin/poetry
+
+RUN poetry install && poetry run poe build
+
+RUN ls -la ./dist/
 
 # Include global args in this stage of the build
 ARG FUNCTION_DIR="/home/app/"
@@ -45,7 +51,7 @@ COPY tests/integration/test-handlers/echo/* ${FUNCTION_DIR}
 # Install the function's dependencies
 WORKDIR ${FUNCTION_DIR}
 RUN python${RUNTIME_VERSION} -m pip install \
-        ${RIC_BUILD_DIR}/dist/awslambdaric-test.tar.gz \
+        ${RIC_BUILD_DIR}/dist/*.whl \
         --target ${FUNCTION_DIR}
 
 
diff --git a/tests/integration/docker/Dockerfile.echo.amazonlinux2 b/tests/integration/docker/Dockerfile.echo.amazonlinux2
index be05aa1..1c80890 100644
--- a/tests/integration/docker/Dockerfile.echo.amazonlinux2
+++ b/tests/integration/docker/Dockerfile.echo.amazonlinux2
@@ -22,7 +22,8 @@ RUN yum install -y \
   openssl11-devel \
   bzip2-devel \
   libffi-devel \
-  sqlite-devel
+  sqlite-devel \
+  curl
 
 RUN RUNTIME_LATEST_VERSION=${RUNTIME_VERSION}.$(curl -s https://www.python.org/ftp/python/ | \
                                                 grep -oE "href=\"$(echo ${RUNTIME_VERSION} | sed "s/\\./\\\./g")\.[0-9]+" | \
@@ -72,6 +73,9 @@ RUN wget --quiet -O cmake-install https://github.com/Kitware/CMake/releases/down
 ENV PATH=/usr/local/bin:$PATH
 ENV LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
 
+# Create symlinks for consistent python usage
+RUN ln -sf /usr/local/bin/python${RUNTIME_VERSION} /usr/local/bin/python3 && \
+    ln -sf /usr/local/bin/python${RUNTIME_VERSION} /usr/local/bin/python
 
 # Include global args in this stage of the build
 ARG RIC_BUILD_DIR="/home/build/"
@@ -81,8 +85,15 @@ RUN mkdir -p ${RIC_BUILD_DIR}
 WORKDIR ${RIC_BUILD_DIR}
 COPY . .
 
-RUN make init build test && \
-    mv ./dist/awslambdaric-*.tar.gz ./dist/awslambdaric-test.tar.gz
+# Install wheel and poetry using the correct python version
+RUN /usr/local/bin/python${RUNTIME_VERSION} -m pip install wheel poetry
+
+# Configure poetry to use the correct python version
+RUN poetry config virtualenvs.create false
+
+RUN poetry install && poetry run poe build
+
+RUN ls -la ./dist/
 
 # Include global args in this stage of the build
 ARG FUNCTION_DIR="/home/app/"
@@ -90,15 +101,12 @@ ARG FUNCTION_DIR="/home/app/"
 RUN mkdir -p ${FUNCTION_DIR}
 # Copy function code
 COPY tests/integration/test-handlers/echo/* ${FUNCTION_DIR}
-# Copy Runtime Interface Client .tgz
-RUN cp ./dist/awslambdaric-test.tar.gz ${FUNCTION_DIR}/awslambdaric-test.tar.gz
 
 # Install the function's dependencies
 WORKDIR ${FUNCTION_DIR}
 RUN python${RUNTIME_VERSION} -m pip install \
-        awslambdaric-test.tar.gz \
-        --target ${FUNCTION_DIR} && \
-    rm awslambdaric-test.tar.gz
+        ${RIC_BUILD_DIR}/dist/*.whl \
+        --target ${FUNCTION_DIR}
 
 
 # Stage 4 - final runtime interface client image
diff --git a/tests/integration/docker/Dockerfile.echo.amazonlinux2023 b/tests/integration/docker/Dockerfile.echo.amazonlinux2023
index 16bbc79..283f8fa 100644
--- a/tests/integration/docker/Dockerfile.echo.amazonlinux2023
+++ b/tests/integration/docker/Dockerfile.echo.amazonlinux2023
@@ -6,7 +6,7 @@ FROM public.ecr.aws/amazonlinux/amazonlinux:${DISTRO_VERSION} AS python-amazonli
 ARG RUNTIME_VERSION
 
 # Install apt dependencies
-RUN dnf install -y \
+RUN dnf install -y --allowerasing \
   gcc \
   gcc-c++ \
   tar \
@@ -22,7 +22,8 @@ RUN dnf install -y \
   openssl-devel \
   bzip2-devel \
   libffi-devel \
-  sqlite-devel
+  sqlite-devel \
+  curl
 
 RUN RUNTIME_LATEST_VERSION=${RUNTIME_VERSION}.$(curl -s https://www.python.org/ftp/python/ | \
                                                 grep -oE "href=\"$(echo ${RUNTIME_VERSION} | sed "s/\\./\\\./g")\.[0-9]+" | \
@@ -73,6 +74,9 @@ RUN wget --quiet -O cmake-install https://github.com/Kitware/CMake/releases/down
 ENV PATH=/usr/local/bin:$PATH
 ENV LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
 
+# Create symlinks for consistent python usage
+RUN ln -sf /usr/local/bin/python${RUNTIME_VERSION} /usr/local/bin/python3 && \
+    ln -sf /usr/local/bin/python${RUNTIME_VERSION} /usr/local/bin/python
 
 # Include global args in this stage of the build
 ARG RIC_BUILD_DIR="/home/build/"
@@ -85,15 +89,14 @@ COPY . .
 # distutils no longer available in python3.12 and later
 #   https://docs.python.org/3/whatsnew/3.12.html
 #   https://peps.python.org/pep-0632/
-RUN pip3 install setuptools
-RUN make init build 
+RUN /usr/local/bin/python${RUNTIME_VERSION} -m pip install setuptools wheel poetry
 
-RUN mv ./dist/awslambdaric-*.tar.gz ./dist/awslambdaric-test.tar.gz
-RUN python${RUNTIME_VERSION} -m pip install \
-      ./dist/awslambdaric-test.tar.gz \
-      --target ${RIC_BUILD_DIR}
+# Configure poetry to use the correct python version
+RUN poetry config virtualenvs.create false
+
+RUN poetry install && poetry run poe build
 
-RUN make test
+RUN ls -la ./dist/
 
 # Include global args in this stage of the build
 ARG FUNCTION_DIR="/home/app/"
@@ -101,15 +104,12 @@ ARG FUNCTION_DIR="/home/app/"
 RUN mkdir -p ${FUNCTION_DIR}
 # Copy function code
 COPY tests/integration/test-handlers/echo/* ${FUNCTION_DIR}
-# Copy Runtime Interface Client .tgz
-RUN cp ./dist/awslambdaric-test.tar.gz ${FUNCTION_DIR}/awslambdaric-test.tar.gz
 
 # Install the function's dependencies
 WORKDIR ${FUNCTION_DIR}
 RUN python${RUNTIME_VERSION} -m pip install \
-        awslambdaric-test.tar.gz \
-        --target ${FUNCTION_DIR} && \
-    rm awslambdaric-test.tar.gz
+        ${RIC_BUILD_DIR}/dist/*.whl \
+        --target ${FUNCTION_DIR}
 
 
 # Stage 4 - final runtime interface client image
diff --git a/tests/integration/docker/Dockerfile.echo.debian b/tests/integration/docker/Dockerfile.echo.debian
index bf0f4fa..2749d9b 100644
--- a/tests/integration/docker/Dockerfile.echo.debian
+++ b/tests/integration/docker/Dockerfile.echo.debian
@@ -10,7 +10,8 @@ RUN apt-get update && \
         g++ \
         make \
         cmake \
-        libcurl4-openssl-dev
+        libcurl4-openssl-dev \
+        curl
 
 # Include global args in this stage of the build
 ARG RIC_BUILD_DIR="/home/build/"
@@ -20,8 +21,13 @@ RUN mkdir -p ${RIC_BUILD_DIR}
 WORKDIR ${RIC_BUILD_DIR}
 COPY . .
 RUN pip3 install setuptools
-RUN make init build test && \
-    mv ./dist/awslambdaric-*.tar.gz ./dist/awslambdaric-test.tar.gz
+# Install Poetry
+RUN curl -sSL https://install.python-poetry.org | python3 - && \
+    ln -s /root/.local/bin/poetry /usr/local/bin/poetry
+
+RUN poetry install && poetry run poe build
+
+RUN ls -la ./dist/
 
 # Include global args in this stage of the build
 ARG FUNCTION_DIR="/home/app/"
@@ -29,15 +35,12 @@ ARG FUNCTION_DIR="/home/app/"
 RUN mkdir -p ${FUNCTION_DIR}
 # Copy function code
 COPY tests/integration/test-handlers/echo/* ${FUNCTION_DIR}
-# Copy Runtime Interface Client .tgz
-RUN cp ./dist/awslambdaric-test.tar.gz ${FUNCTION_DIR}/awslambdaric-test.tar.gz
 
 # Install the function's dependencies
 WORKDIR ${FUNCTION_DIR}
 RUN pip install \
-        awslambdaric-test.tar.gz \
-        --target ${FUNCTION_DIR} && \
-    rm awslambdaric-test.tar.gz
+        ${RIC_BUILD_DIR}/dist/*.whl \
+        --target ${FUNCTION_DIR}
 
 
 # Stage 2 - final runtime interface client image
diff --git a/tests/integration/docker/Dockerfile.echo.ubuntu b/tests/integration/docker/Dockerfile.echo.ubuntu
index 0ce3000..c9d2848 100644
--- a/tests/integration/docker/Dockerfile.echo.ubuntu
+++ b/tests/integration/docker/Dockerfile.echo.ubuntu
@@ -54,8 +54,11 @@ WORKDIR ${RIC_BUILD_DIR}
 COPY . .
 RUN . /home/venv/bin/activate && \
     pip install setuptools && \
-    make init build test && \
-    mv ./dist/awslambdaric-*.tar.gz ./dist/awslambdaric-test.tar.gz
+    curl -sSL https://install.python-poetry.org | python3 - && \
+    ln -s /root/.local/bin/poetry /usr/local/bin/poetry && \
+    poetry install && poetry run poe build
+
+RUN ls -la ./dist/
 
 
 
@@ -68,7 +71,7 @@ COPY tests/integration/test-handlers/echo/* ${FUNCTION_DIR}
 # Install the function's dependencies
 WORKDIR ${FUNCTION_DIR}
 RUN . /home/venv/bin/activate && \
-    pip install ${RIC_BUILD_DIR}/dist/awslambdaric-test.tar.gz --target ${FUNCTION_DIR}
+    pip install ${RIC_BUILD_DIR}/dist/*.whl --target ${FUNCTION_DIR}
 
 
 
diff --git a/tests/test_bootstrap.py b/tests/test_bootstrap.py
index 33afb1c..d08d900 100644
--- a/tests/test_bootstrap.py
+++ b/tests/test_bootstrap.py
@@ -924,10 +924,13 @@ def test_binary_with_application_json(self):
         self.lambda_runtime.post_invocation_error.assert_called_once()
 
         (
-            invoke_id,
-            error_result,
-            xray_fault,
-        ), _ = self.lambda_runtime.post_invocation_error.call_args
+            (
+                invoke_id,
+                error_result,
+                xray_fault,
+            ),
+            _,
+        ) = self.lambda_runtime.post_invocation_error.call_args
         error_dict = json.loads(error_result)
 
         self.assertEqual("invoke-id", invoke_id)