• Migrated monolithic architecture to Spring Boot microservices, improving system scalability and deployment efficiency by 40%.
• Optimized JPA/Hibernate queries, improving transaction processing performance by 25%.
• Implemented Redis caching, reducing database load by 40% and improving API response times by 50–60%.
• Built secure authentication and authorization using OAuth2 and JWT for enterprise applications.
• Deployed and maintained applications on AWS (EC2, RDS, S3) supporting large enterprise user bases.
• Developed React-based UI components, reducing onboarding time and improving user engagement.
• Created and maintained unit and integration tests using Junit and Mockito, achieving 90% test coverage and improving release stability.