I provide secure, scalable, and production-ready backend development using Java and Spring Boot. With around 6 years of professional experience, I have worked on enterprise fintech applications, payment systems, merchant management platforms, POS solutions, transaction processing, settlements, payouts, refunds, reconciliation, and workflow automation.
Services included:
• Java and Spring Boot application development
• REST API and Microservices development
• Spring Security, JWT authentication, and role-based authorization
• Payment gateway and third-party API integration
• Database integration using Oracle, MySQL, and SQL Server
• Spring Data JPA, Hibernate, and SQL query optimization
• Kafka and RabbitMQ integration
• Scheduled jobs and background processing
• Bug fixing, code refactoring, and performance optimization
• Swagger and OpenAPI documentation
• JUnit and Mockito testing
• Docker configuration and deployment support
• Legacy application modernization
I follow clean architecture and organize applications using controller, service, repository, DTO, mapper, validation, security, and exception-handling layers.
Project deliverables may include:
• Complete and well-structured source code
• REST API endpoints
• Database schema and SQL scripts
• Swagger documentation
• Postman collection
• Unit and integration tests
• Dockerfile and deployment instructions
• Setup and technical documentation
I am available for new application development, existing system enhancement, bug resolution, API integration, and long-term backend support. Every project is developed according to agreed requirements, milestones, and delivery timelines.