• Designed and developed Spring Boot microservices supporting fintech wallet and merchant portal features processing 100K+ transactions/day.

• Built event-driven real-time payment workflows using Kafka, enabling sub-second transaction processing for critical payment events.

• Optimized PostgreSQL schemas and queries, improving data access performance by 50–60% in production systems.

• Containerized services using Docker and deployed on Kubernetes, enabling auto-scaling during traffic spikes and 70% faster release cycles.

• Developed responsive Angular-based UI components, contributing to improved merchant usability and engagement.

• Implemented CI/CD pipelines with Jenkins, automating build, test, and deployment processes.

• 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.