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I will build AWS serverless backends with lambda, API gateway, and dynamodb
Asadullah
About this gig
I build production-ready serverless backends on AWS from single Lambda functions to full enterprise architectures with nested CloudFormation stacks.
What I Deliver
Core Infrastructure: Lambda functions (Python) with proper error handling. API Gateway with request validation and CORS. DynamoDB tables with optimized access patterns. S3 buckets for file storage and static assets.
Authentication & Security: Cognito user pools and identity pools IAM roles with least-privilege policies.
Integration & Messaging: SQS queues for async processing. SNS topics for notifications. Step Functions for complex orchestration.
Deployment & Operations: CloudFormation / SAM templates. Nested stacks for modular architecture. CloudWatch logging and alerting. Multi-environment setup (dev/staging/prod).
Tech Stack: Lambda (Python), API Gateway, DynamoDB, S3, EFS, Cognito, IAM, SQS, SNS, SAM
Background:
- Built nested-stack serverless platform serving 10K+ users
- Designed event-driven architectures with Lambda, SQS, and DynamoDB
- Experience with multi-tenant serverless systems
- Built async data pipelines and ETL systems
Use Cases:
- SaaS backend APIs
- Mobile app backends
- Data ingestion pipelines
Get to know Asadullah
Asadullah
Python Backend Developer, AWS, Data Engineering
- FromBangladesh
- Member sinceOct 2023
- Last delivery8 months
Languages
Bengali, English
I build backend APIs and data systems that scale.
5+ years building production systems: FastAPI/Django backends, AWS serverless platforms (10K+ users), async data pipelines, OpenSearch integrations (100K+ docs), web scrapers, and InfluxDB time-series systems with Grafana dashboards.
I deliver clean, documented, production-ready code — APIs with proper validation, ETL pipelines with error handling, and infrastructure that doesn't break at 3 AM.
Published researcher (Springer, IEEE) on distributed systems.
Message me with your requirements — I'll give you an honest assessment.
My Portfolio
Other Software Development Services I Offer
FAQ
I need someone to design the complete backend system for my frontend application.
Sure. I can design a REST API-based backend system for your frontend applications, web and mobile. Please reach out to me with your ideas, specifications, or requirements.
I need someone to migrate a monolithic application to AWS serverless.
I am perfectly suited for this job. I helped one of the largest MOOC companies in Bangladesh to migrate from a server-based system to AWS. I designed their database schema for DynamoDB, set up nested stack architecture, integrated payment gateways, and many more.
I need someone to convert my Django or Flask application to AWS serverless.
Previously I have migrated framework-based applications to AWS. I can set up VPC and integrate other AWS services as per the requirements.
Which AWS services will you integrate with the APIs?
Depending on the project requirements and cost, I can integrate any of the following services - API Gateway, API Gateway Proxy, Lambda, Dynamodb, RDS, Aurora, OpenSearch, SQS, SNS, Cognito, IAM, S3, SES, Pinpoint, Chime, VPC, KMS, ACM, Event Bridge, Nested Stack, Lambda Layers, EFS, and many more!
I want to process some files stored on S3.
I can create a Lambda function to process every file in an S3 bucket and store it back in S3. I can also create a Lambda trigger to initiate a processor task every time a file is uploaded to the S3 bucket.
Can you design a CI/CD pipeline for my project?
Sure. With an additional cost, I can also set up a CI/CD pipeline for your project to automate the deployment to AWS. I will use AWS CodeBuild, CodeCommit, CodeDeploy, and CodePipeline.
