Built RESTful APIs in Python (Django REST Framework) with PostgreSQL — clean request/response schemas, ORM-based data access, structured error handling

Wrote unit and integration tests using pytest across all API endpoints — full test coverage before every release

Built and maintained CI/CD pipelines via GitHub Actions — automated testing and deployment to AWS EC2, enabling weekly production releases

Developed React.js frontend consuming internal REST APIs — hosted on S3 + CloudFront + Route 53

Built AI agents using AWS Bedrock API (Python) to automate complaint resolution — cut manual handling time by 40%

Developed Lambda functions with SNS/SES for event-driven background processing and notifications

Implemented auth using AWS Cognito (OAuth2) + Secrets Manager for secure credential handling

Monitored 15+ Lambda functions via CloudWatch dashboards — reduced incident response from hours to under 15 mins

Enforced PCI-DSS compliance via automated DevSecOps pipelines — zero critical security findings in internal audit

Stack: Python · Django REST Framework · React.js · PostgreSQL · pytest · GitHub Actions · AWS Lambda · Bedrock · Cognito · SNS · SES · S3 · CloudFront · Route 53 · CloudWatch · EC2

Migrated legacy monolith to Lambda + API Gateway microservices — cut server costs by 35%, improved deploy frequency from monthly to weekly

Configured CloudWatch + SNS alerting for traffic spike detection — eliminated 3 recurring outages in first month

Enforced IAM least-privilege policies and S3 encryption across all environments — passed first security review with no critical findings

Stack: AWS Lambda · API Gateway · CloudWatch · SNS · S3 · IAM