API & Canonical Model Engineer

API & Canonical Model Engineer (Senior) Location: India - Remote Employment Type: Full-Time Experience: Senior (7+ Years) Roles & Responsibilities Design and develop scalable REST APIs and backend microservices using Java and Spring Boot. Build and maintain the Canonical Data Model and Core APIs for enterprise applications. Develop Backend-for-Frontend (BFF) services and API Gateway integrations. Build secure read and write APIs using CQRS and distributed system design patterns. Implement business rules, eligibility, and personalization services. Develop practitioner/admin consoles with role-based access, workflows, and audit capabilities. Collaborate with cross-functional teams to build secure, high-performance, and scalable backend solutions. Mandatory Skills 5+ years of experience in Java and Spring Boot microservices development. Strong experience designing and developing REST APIs. Hands-on experience with OpenAPI v3 (Contract-First API Design). Experience with API Gateway (Spring Cloud Gateway or similar). Strong knowledge of CQRS, Saga, Transactional Outbox, Idempotency, and Distributed Systems. Experience with PostgreSQL and data modeling. Kafka integration experience. Strong understanding of OAuth2, OIDC, and Zero Trust Security. Experience with React or Angular. Experience building enterprise-grade microservices and backend applications. Good to Have Experience designing Enterprise Canonical Data Models. Backend-for-Frontend (BFF) architecture experience. Rules Engine / Expression Engine implementation. Experience with workflow, approval, or audit-based applications. Originally posted on Himalayas