Java Developer (RARR Job 5615)

Java Backend Developer (1–4 years)

• 1–4 years with Java 11+ and Spring Boot (REST APIs, starters, profiles)

• API design: request/response models, validation, error handling, pagination, versioning

• Data layer: JPA/Hibernate, query optimization, transactions; hands-on with PostgreSQL

• Advanced SQL: joins, CTEs, window functions; performance via indexes and EXPLAIN

• Security: Spring Security/OAuth2/JWT, role-based access, basic hardening

• Testing: JUnit5, Mockito, integration tests (Testcontainers nice to have)

• Messaging & async: exposure to Kafka/RabbitMQ, schedulers, retries, idempotency (good to have)

• Observability: logs (SLF4J), metrics/health (Actuator), tracing basics

• Build & DevOps: Maven/Gradle, Docker, environment configs; Git/PR workflow

• Quality: clean code, layered architecture, DTO/Entity mapping (MapStruct), documentation

• Nice to have: Caching (Redis), file/object storage, CI/CD, cloud basics (Azure/AWS), rate limiting, feature flags, RLS familiarity with Postgres