Vamsi Krishna

Full-stack Developer @American Express

US

Developed and enhanced distributed microservices using Spring Boot to manage real-time transaction authorization and fraud detection flows.• Integrated Kafka-based message streaming for decoupled processing of high-volume payment events and transaction notifications.• Designed secure, versioned RESTful APIs consumed by mobile and web platforms, ensuring backward compatibility and low-latency response.• Worked with UI developers to build interactive dashboards and payment workflows using React.js, Redux, and responsive design.• Managed deployment pipelines with Jenkins and GitHub Actions, automating unit tests, security scans, and Docker container builds.• Configured and deployed applications on AWS ECS with service discovery and centralized logging via CloudWatch and ELK Stack.• Utilized Redis for caching frequent user payment configurations and session tokens to improve performance and availability.• Wrote unit and integration test suites using JUnit and Mockito to ensure test coverage, mock external systems, and minimize regressions.• Used Swagger/OpenAPI for API documentation, enabling seamless integration and developer onboarding across global teams.• Created SQL queries, views, and stored procedures in PostgreSQL to support complex reconciliation, reporting, and audit trails.• Troubleshot production incidents by analyzing service logs and traces, identifying issues in distributed tracing via Zipkin.

REVA University

Bachelor of Engineering - BE