• Developed RESTful APIs using Java, Spring Boot, and Hibernate for product catalog, customer orders, and payment management, reducing response time by 30%.• Integrated PostgreSQL with backend services, implemented query optimizations and indexing, improving performance by 30%.• Engineered microservices architecture for scalable solutions with Spring Cloud, ensuring modularity and easier deployment.• Automated deployment pipelines using Jenkins, AWS, and Docker, achieving a 40% improvement in deployment speed.• Applied JWT token-based authentication for secure user login and access.• Developed backend systems using Java, Spring Boot, and JPA to create microservices for several small to midsized clients.• Deployed applications on AWS EC2 and S3, utilizing Docker for containerization and managing cloud resources for optimal performance.

• Designed and implemented REST APIs with Spring Boot and MongoDB to handle critical business operations, reducing API response time by 30%.• Developed backend services using Java, Spring Boot, and Hibernate for enterprise-level applications, improving data retrieval speed and system stability.• Leveraged AWS services (EC2, Lambda, S3) for backend hosting and cloud computing, improving the system's scalability and availability.• Utilized Docker and Kubernetes for containerized deployments, ensuring high availability and fault tolerance.• Developed unit and integration tests with JUnit and Mockito, resulting in 85% test coverage and reducing production bugs.• Optimized database performance with SQL and NoSQL databases (MySQL, MongoDB), leading to reduced query execution time by 25%.• Implemented JWT and OAuth2 for securing APIs and user authentication.