Senior Java Developer

Position Overview We are seeking an experienced Senior Backend Java Developer with a specialized focus on microservices architecture, distributed systems, and backend engineering. In this role, you will design, build, and scale microservices-based RESTful APIs and enterprise backend components. You will focus on service communication, asynchronous messaging, optimizing database interactions, and driving sound microservice design principles across the stack. Key Responsibilities • Design, build, and maintain scalable microservices and distributed backend services using Java and the Spring / Spring Boot ecosystem. • Implement clean microservice architectural patterns, domain-driven design, and reusable software modules. • Author standard OpenAPI/Swagger documentation for REST endpoints and inter-service contracts. • Leverage Java concurrency utilities and asynchronous messaging to ensure efficient application performance. • Diagnose, debug, and resolve memory leaks, thread contention, and garbage collection bottlenecks in containerized environments. • Design and optimize relational and NoSQL database schemas tailored for decoupled microservices. • Manage data persistence and transactional boundaries across distributed services using Spring Data JPA. • Write tuned SQL queries, establish effective database indexing, and configure caching strategies (e.g., Redis). • Implement robust microservice resiliency patterns including Circuit Breakers, Rate Limiting, and Retry policies. • Implement standard API and service security mechanisms (OAuth2, JWT authentication, authorization, and data sanitization). • Build structured logging, health checks, and application metrics using standard logging frameworks. • Write clean, maintainable, modular, and unit-tested microservice code using JUnit and Mockito. • Participate in code reviews, technical architecture reviews, and maintain test coverage across application modules. Requirements • 5+ years of hands-on software development experience using Java with deep knowledge of Collections, Streams API, Multithreading/Concurrency, and Exception Handling. • Strong expertise in Spring Boot, Spring Core, Spring MVC, and dependency injection paradigms. • Deep understanding of microservices architecture, distributed systems design principles, and RESTful architectural styles. • Advanced proficiency in Spring Data JPA, raw SQL query tuning, and database migration tooling. • Practical, hands-on experience with message brokers and event streaming architectures. • Solid grasp of Design Patterns, TDD/unit testing principles (JUnit, Mockito), containerization basics, and CI/CD deployment pipelines.