New Lambda API development
Design and implement REST APIs, HTTP APIs, WebSocket APIs, Lambda proxy integrations, request validation, custom domains, throttling, Python business logic and AWS service integrations.
Senior AWS Lambda Consultant · API Gateway Expert · Senior Python Engineer
Build, repair or scale your AWS Lambda & API Gateway platform.
Hire one senior engineer to architect, code, secure, automate and troubleshoot the complete serverless API stack—production Python, AWS Lambda Powertools, Amazon API Gateway, AWS CDK TypeScript, Terraform, CI/CD and GenAI/RAG integrations.
- Launch a production-ready REST, HTTP, WebSocket, private or high-frequency API.
- Fix failing Lambdas, permissions, latency, retries, deployments, logging and integrations.
- Modernize existing Python code and infrastructure without handing work across multiple vendors.
- Connect serverless APIs to SQS, S3, DynamoDB, Aurora PostgreSQL, Redshift, Step Functions or RAG workflows.
Best fit: companies that need senior hands-on delivery—not only advice. Available for focused fixes, architecture reviews, short implementation assignments, milestone-based projects and long-term programming associations.
10+ yearsHands-on senior Python application and Lambda engineering
60+ accountsEnterprise AWS architecture, governance and operations
PowertoolsExtensive production use for Python Lambdas
CDK + TerraformReusable infrastructure as code and automated delivery
1+ yearRecent GenAI, RAG and LLM application delivery
Commercial AWS serverless services
Bring a concrete AWS problem. Get architecture and implementation together.
The page is focused on buyers searching for AWS Lambda development, Amazon API Gateway consulting, senior Python engineering, serverless architecture and AWS DevOps delivery.
Serverless troubleshooting
Diagnose Lambda timeouts, API Gateway errors, IAM failures, VPC connectivity, cold-start concerns, retry loops, idempotency issues, CloudWatch gaps and deployment failures.
Private and enterprise APIs
Implement private API Gateway, VPC endpoints, Amazon Cognito, Auth0, custom Lambda authorizers, machine-to-machine authentication, IAM least privilege, KMS and Secrets Manager.
Python and architecture refactoring
Improve existing Lambda handlers, service layers, Boto3 automation, asyncio workflows, JSON transformation, validation, SQL, ETL, tests, maintainability and production debugging.
Infrastructure and DevOps delivery
Build AWS CDK v2 applications in TypeScript, Terraform, AWS SAM, CloudFormation, reusable constructs, GitHub Actions, CI/CD packaging, automated testing and multi-environment deployments.
GenAI, RAG and LLM backends
Deliver Lambda-backed APIs for LangChain, OpenAI, custom RAG pipelines, agents, prompt engineering, streaming responses, evaluation, Milvus, pgvector and large-scale vector retrieval.
Not sure whether the issue is in Lambda, API Gateway, IAM, networking, Python or infrastructure?
Send the current architecture, error symptoms and desired outcome. I can assess the full request path rather than treating one component in isolation.
Ways to engage
Start with the smallest useful scope.
Engagements can be arranged through fixed milestone payments or weekly payment schedules. A small demo or short test job is also possible when needed.
Architecture and code review
Review the current serverless design, Python code, API flow, IAM, networking, observability, reliability and deployment approach; identify risks and provide an actionable implementation plan.
Focused implementation sprint
Build or repair a clearly defined Lambda, API Gateway, Python, CDK, Terraform, DevOps or GenAI deliverable with hands-on coding, testing and deployment support.
Ongoing senior engineering
Own architecture, implementation, CI/CD, production support and technical leadership across a longer serverless or GenAI programme.
Why senior ownership matters
Architecture, operations and code—owned together.
I work beyond isolated Lambda development. I translate client requirements into secure AWS architectures, build the Python implementation, automate delivery and remain accountable for reliability, security, observability and cost.
Senior AWS Architect
- Serverless, event-driven and multi-account solution design
- Public and private API architectures
- VPC, IAM, security and cross-account design
- Cost-aware, production-ready AWS decisions
- Client discussions, architecture diagrams and actionable delivery plans
Senior AWS DevOps
- CI/CD pipelines, GitHub Actions and release automation
- AWS CDK, SAM, CloudFormation and Terraform delivery
- CloudWatch logging, tracing, metrics and operational troubleshooting
- Docker, Kubernetes, ECS Fargate and AWS Batch integration
- Security controls, governance and multi-environment deployments
Senior Python Programmer
- Advanced business logic, algorithms and API backends
- Boto3 automation and AWS service integrations
- Asyncio, JSON transformation, validation and REST connectors
- Complex SQL, ETL and data-processing workflows
- Unit tests, maintainable modules and production debugging
GenAI, RAG & LLM Engineer
- Recent hands-on delivery of RAG and LLM orchestration
- LangChain and custom Python pipelines
- OpenAI integrations, agents and prompt engineering
- Streaming responses, tracing and evaluation workflows
- Vector search across pgvector and Milvus at large scale
Production Python engineering
Python is the implementation core—not a supporting skill.
I build complex Lambda handlers, reusable service layers, validation and transformation pipelines, asynchronous workflows, AWS automation and external API connectors. The work includes understanding and improving existing codebases as well as designing new systems from first principles.
I have used AWS Lambda Powertools for Python extensively to apply consistent production patterns across serverless services, including structured observability, API event handling and reliability-focused utilities.
ObservabilityLogger · Tracer · Metrics
API handlingREST event routing · responses
ReliabilityIdempotency · validation · retries
Typed eventsData classes · type hints
Python depthBoto3 · asyncio · SQL · ETL
QualityUnit tests · integration tests · debugging
Complete serverless expertise
One specialist across the Lambda API stack.
Secure API design, advanced Python implementation, AWS integrations, infrastructure automation, observability and production support are delivered as one coherent engineering discipline.
AWS Lambda & Powertools
- Advanced Python handlers and reusable service layers
- Structured logging, tracing and custom metrics
- Event-driven and asynchronous processing
- Step Functions orchestration Lambdas
- S3, SQS, DynamoDB, Aurora and Redshift integrations
Amazon API Gateway
- Public, private and high-frequency REST APIs
- HTTP APIs, WebSocket APIs and streaming workflows
- Custom domains, throttling and VPC endpoints
- Lambda proxy integrations and request validation
- CloudWatch request logging and troubleshooting
API Security & Reliability
- Amazon Cognito, Auth0 and custom Lambda authorizers
- Machine-to-machine authentication
- IAM least privilege, KMS and Secrets Manager
- Idempotency, error handling and retry strategies
- Private network access and enterprise controls
AWS CDK TypeScript & Delivery
- AWS CDK v2 applications written in TypeScript
- Reusable constructs for Lambda, API Gateway and IAM
- Terraform and CloudFormation repeatable deployments
- CI/CD packaging, testing and release automation
- Multi-environment and cross-account patterns
Reference architecture
Secure at ingress. Observable at every layer.
A representative production request path combining secure API entry, Python Lambda Powertools patterns, asynchronous workflows and data or GenAI integrations.
ClientsWeb · Mobile · SystemsREST, HTTP, WebSocket or streaming requests
Amazon API GatewaySecure API entryDomains, validation, throttling
AuthorizationCognito · Auth0 · LambdaIdentity and policy enforcement
AWS LambdaPython + PowertoolsLogic, logging, tracing and metrics
Data & AI workflowsSQS · S3 · Aurora · RAGDecoupled processing and retrieval
Selected serverless work
Relevant delivery across GenAI, finance, commerce and enterprise cloud.
Each engagement combined senior architecture with hands-on Python, infrastructure as code, DevOps automation and production AWS responsibility.
AI orchestration APIs
Lambda-backed REST and WebSocket interfaces supporting RAG, LLM orchestration, vector retrieval, Step Functions and large-scale data jobs.
- Python Lambdas for complex workflow steps
- LangChain, OpenAI and custom RAG pipelines
- Auth0 and custom Lambda authorization
- Streaming responses, tracing and observability
- AWS CDK infrastructure and automated testing
Multi-account automation
Serverless governance and operations across an AWS organization with more than 60 accounts.
- Billing-limit and automatic-tagging Lambdas
- IAM key rotation and account automation
- CloudTrail-triggered security controls
- Private APIs and Cognito machine-to-machine access
- CloudFormation, CI/CD and operational support
Infrastructure-defined Lambda APIs
Python Lambda functions and API Gateway endpoints deployed through repeatable AWS CDK and CloudFormation workflows.
- Python 3 Lambda business logic
- REST endpoint and integration design
- AWS CDK application development
- CloudFormation synthesis and deployment
- Complete API flow testing
Private financial APIs
Secure, high-performance API services integrated with Amazon Aurora PostgreSQL and enterprise networking.
- Private API Gateway and VPC endpoints
- Custom domains, IAM and secret management
- Complex JSON validation and processing
- Async Python and external REST connectors
- SAM, CloudFormation and CI/CD delivery
Serverless commerce backend
Lambda-based REST endpoints and event-driven pipelines for mobile commerce, pricing and discount operations.
- Complex Python discount calculation engine
- DynamoDB and PostgreSQL integrations
- S3-triggered, staged ETL processing
- Backend API architecture and low-level design
- CloudFormation-based infrastructure
High-frequency ingestion API
An API Gateway and Lambda ingestion layer decoupled from downstream processing for resilience under frequent HTTP POST traffic.
- Request validation and JSON cleanup
- Queue-based decoupling
- Downstream Lambda processing
- Redshift and PostgreSQL delivery
- End-to-end data pipeline architecture
Voice-controlled operations
A custom Alexa workflow translating voice intents into Lambda and API Gateway actions for a physical door-control system.
- End-to-end architecture and Python coding
- Overlapping-command handling
- Obstruction-aware business logic
- Automated deployment scripts
- CloudFormation infrastructure
What the engagement can include
Production deliverables—not a generic consultation.
The exact scope depends on the project, but a typical implementation can cover architecture, source code, infrastructure as code, security, testing, deployment and production readiness.
- Architecture decisions and request-flow design
- Maintainable Python Lambda implementation
- AWS CDK TypeScript, Terraform, SAM or CloudFormation
- IAM, Cognito, Auth0, authorizers, KMS and Secrets Manager
- CloudWatch logs, metrics, tracing and AWS X-Ray
- Unit tests, integration tests and deployment automation
- Operational troubleshooting and handover documentation
Experience timeline
A long track record of Python and AWS delivery.
Focused milestones where Lambda, API Gateway, Python engineering, AWS architecture or GenAI systems were central to the solution.
Aug 2024 — Oct 2025
GenAI, RAG and vector data platform
Recent 1+ year of hands-on GenAI delivery: LangChain and custom orchestration, OpenAI RAG pipelines, REST and WebSocket APIs, Step Functions Lambdas, streaming responses, AWS CDK and vector databases containing approximately 100 million records.
Apr 2023 — Apr 2024
Senior AWS architecture and DevOps across 60+ accounts
Lambda-driven billing, tagging, IAM key rotation, security enforcement and account automation, with Cognito-secured private APIs, complex networking, governance and production troubleshooting.
May 2022 — Jul 2022
CDK-based Lambda API project
Python 3 Lambda functions, API Gateway endpoints, AWS CDK, generated CloudFormation and complete request-flow testing.
Aug 2021 — Apr 2022
Financial microservices and private APIs
Advanced Python programming, asynchronous code, private and custom-domain APIs, Aurora integrations, SAM and CloudFormation, IAM, Secrets Manager, KMS and operational logging.
Jul 2020 — Jul 2021
Commerce, ingestion and voice systems
High-frequency ingestion APIs, e-commerce backend endpoints, complex Python business rules, event-driven ETL and an Alexa-to-Lambda control workflow.
Technology stack
Technical depth retained for specialist searches and technical buyers.
Selected technologies used to design, implement, automate and operate serverless APIs and GenAI-backed systems.
AWS LambdaAmazon API GatewayAWS Lambda Powertools for PythonPythonBoto3AsyncioAWS CDK v2TypeScriptTerraformAWS SAMCloudFormationStep FunctionsAmazon CognitoAuth0Custom Lambda AuthorizersMachine-to-machine authenticationCloudWatchAWS X-RaySQSS3DynamoDBAurora PostgreSQLPostgreSQLRedshiftSecrets ManagerKMSIAMVPCVPC endpointsGitHub ActionsCI/CDDockerKubernetesECS FargateAWS BatchPytestREST APIsHTTP APIsWebSocket APIsLangChainOpenAIGenAILLMRAGMilvuspgvector
Before you contact me
Common project questions.
These answers help qualify the engagement before the first technical discussion.
Can you work with an existing codebase?
Yes. The work includes understanding, troubleshooting and improving existing Python, Lambda, API Gateway and infrastructure code as well as designing new systems.
Do you only advise, or also implement?
I provide senior architecture and hands-on implementation, including Python coding, infrastructure as code, security, testing, CI/CD and production troubleshooting.
Can you handle private enterprise APIs?
Yes. Relevant experience includes private API Gateway, VPC endpoints, complex networking, Cognito, Auth0, machine-to-machine access, IAM, KMS and Secrets Manager.
Can the engagement start small?
Yes. I am open to short-term assignments, a small demo or test job, fixed milestones and weekly payment schedules.
Can you integrate GenAI or RAG?
Yes. Recent delivery includes LangChain, OpenAI, custom RAG orchestration, streaming, agents, evaluation, Step Functions, Milvus and pgvector.
What should I include in the first message?
Share the current architecture, the technical problem or required deliverable, relevant errors or constraints, and the preferred timeline.
Senior AWS serverless ownership
Tell me what you need to build, fix or scale.
Available for AWS Lambda development, Amazon API Gateway consulting, senior Python engineering, serverless architecture, AWS CDK TypeScript, Terraform, AWS DevOps automation, technical leadership, RAG and LLM application delivery.
For a useful first response, include: your current architecture, the problem or deliverable, relevant AWS services, expected traffic or operational constraints, and your preferred timeline.