Key Responsibilities:Design, develop, and maintain backend systems using Java (Spring Boot) and Node.js (Express or Nest.js). Build and integrate RESTful and GraphQL APIs for web and mobile applications. Work with microservices architecture and containerized environments (Docker, Kubernetes). Collaborate with front-end developers, QA, and DevOps teams to ensure seamless integration and deployment. Optimize application performance, scalability, and reliability. Implement security best practices,