Java Backend Developer

Java Backend Developer We are seeking a highly capable Java Backend Developer (Individual Contributor) to join a mission-critical team working with a U.S.-based global banking client. This role is suited for experienced backend engineers with deep technical expertise in building, deploying, and supporting scalable microservices in secure, enterprise-grade environments. You will be responsible for hands-on development, solutioning, deployment, and support of backend systems aligned to BFSI use cases. Model : Hybrid (3 Days Onsite) Client : US-based Global Banking Institution Notice Period : 21 DaysKey Responsibilities : - Design, develop, and maintain robust and secure backend services using Java, Spring Boot, and RESTful APIs. - Build microservices adhering to cloud-native principles including stateless design, containerization, and fault tolerance. - Ensure integration of JWT-based authentication and role-based access using Spring Security. - Manage data persistence using JPA/Hibernate with a strong focus on performance, transactional integrity, and query optimization. - Develop and document well-structured APIs including pagination, versioning, and error handling. - Support deployment and lifecycle management using Docker and Kubernetes (K8s), with YAML configurations and cloud-native patterns. - Collaborate with DevOps teams for CI/CD processes using Jenkins or GitLab CI and troubleshoot build/deploy issues. - Write and maintain unit and integration tests using JUnit and Mockito, with a strong focus on test coverage and code quality. - Monitor applications using tools like ELK, Splunk, or Prometheus and respond to alerts in production environments. - Participate in code reviews, documentation, and agile ceremonies, contributing to overall code health and delivery quality.Technical Skills & Expertise : Candidates should have strong hands-on experience with the following : - Proficiency in Java 8/11+, including OOP concepts, Streams, Lambdas, memory management, functional interfaces, and newer constructs (var, HttpClient). - Backend development using J2EE and Spring Boot, with practical knowledge of configuring beans, profiles, exception handling, and Spring Security for stateless authentication. - Design and development of RESTful APIs with deep understanding of HTTP protocols, status codes, headers, pagination, versioning, and OpenAPI/Swagger documentation. - Microservices architecture including API gateways, service discovery, circuit breakers, and container-based deployments. - Experience with multithreading and concurrency patterns including synchronization, ExecutorService, concurrent collections, and race condition debugging. - Database expertise with SQL, including writing optimized queries, joins, subqueries, and using JPA/Hibernate features like lazy loading, cascading, and native queries. - CI/CD tools such as Jenkins or GitLab CI, with ability to manage environment variables and resolve build pipeline issues. - Kubernetes for deploying Java services using YAML configurations (pods, services, ConfigMaps, probes). Experience with OpenShift (OCP) is a plus. - Exposure to cloud platforms such as GCP, AWS, or Azure, especially in backend workload deployment (GKE, EKS preferred). - Version control using Git, including rebasing, branching strategies (e.g., Git Flow), and resolving merge conflicts in collaborative environments. - Unit and integration testing using JUnit, Mockito, and optionally Testcontainers or JUnit 5 with >60% test coverage expectations.