Top Backend Jobs in Kolkata

Design, develop, and optimize Oracle-based databases and PL/SQL; build and maintain Core Java backend services and RESTful APIs; lead requirements gathering; tune performance and ensure scalable RDBMS architectures; review and modernize legacy SQL and Java code.

Maintain and enhance Node.js/TypeScript backend services for a SaaS platform, ensuring uptime, scalability, and high-performance APIs. Optimize MongoDB, implement Redis and job queues, manage AWS infrastructure, enforce security and compliance (GDPR, email handling), document APIs, write tests, and debug production issues.

Design and implement backend game engine and RNG systems for slots and table games. Build deterministic, auditable, high-concurrency real-time gameplay systems, manage bet lifecycle, integrate wallets/transactions, optimize performance, and develop simulation/test systems for RTP validation while collaborating with frontend and game client teams.

Design, develop, and maintain highly scalable microservices and backends (Java/Spring) for millions of users. Collaborate with product owners, perform code reviews, respond to production incidents, mentor junior engineers, participate in team ceremonies, and potentially share on-call duties.

Develop end-to-end product features across frontend and backend, integrate AI coding tools into daily workflow, mentor peers, improve cross-team efficiency, and contribute across the full product lifecycle from design to deployment.

As a Senior Back End Developer, you'll design and optimize scalable software back-end systems for web and mobile applications, collaborating with various teams to enhance platform reliability and performance.

Backend Java developer responsible for designing, building, testing, and maintaining RESTful microservices and APIs using Spring Boot/WebFlux, Kafka, Docker, and Kubernetes. Work includes API design, CI/CD, unit and integration testing, and integrating event-driven systems and Sterling OMS.

Develop backend services using Java/J2EE and Spring Boot. Design microservices (HL/LL), implement cloud infrastructure, integrate via MQ/Kafka/REST, enforce security (JWT/OAuth/Kerberos), use CI/CD (Maven, Docker, Jenkins), and work with SQL.

Expert-level backend engineer to lead and mentor a team, design and implement large-scale distributed e-commerce systems, drive architectural improvements, write high-quality code, and collaborate with product and cross-functional teams in an Agile/Scrum environment.

Design, build, and maintain high-performance Spring Boot REST APIs and microservices. Integrate and optimize Snowflake data sources, implement security (OAuth2/JWT/Spring Security), deploy containerized services with Docker/Kubernetes, and support CI/CD and testing in an Agile environment.

Design, build, and maintain secure, scalable .NET backend APIs and middleware to integrate the Zeta platform. Implement cloud-native solutions on Azure (APIM, Functions, Logic Apps), ensure API security (OAuth2/JWT), work with SQL/NoSQL data stores, troubleshoot production issues, and participate in Agile delivery.

Design, build, and maintain scalable Java backend services and APIs (Spring Boot). Collaborate with cross-functional teams, optimize performance, ensure security, troubleshoot issues, integrate third-party services, and maintain documentation.

Design and build Java/Spring Boot microservices for a Notification Hub: routing, preference sync, webhook ingestion, Pub/Sub consumers, Avro schema processing, vendor adapter/API integrations, resilience, and operational troubleshooting.

Build and maintain Java/Spring Boot microservices for a Notification Hub, handling Pub/Sub consumers, Avro schema processing, webhook ingestion, vendor adapters, integrations with internal systems, and resilience features like retries, DLQs, and circuit breakers.

Design, develop, and maintain scalable server-side services and APIs. Manage SQL/NoSQL databases, write tests, debug and optimize performance, document systems, and collaborate with frontend, product, and DevOps teams.

Develop and maintain high-performance backend services using Java and Spring Boot. Build RESTful APIs, integrate with front-end and third-party systems, collaborate with cross-functional teams, participate in code reviews, troubleshoot production issues, and improve CI/CD, performance, and development processes.

Design, build, and maintain scalable backend services and RESTful APIs using Java and Spring Boot. Implement event-driven architectures with Kafka, manage data in PostgreSQL/Redis, ensure performance and resilience, troubleshoot production issues, participate in code reviews, and collaborate with cross-functional teams for releases.

Design, develop, and maintain Java-based backend services using Spring frameworks and Kafka. Build scalable RESTful APIs, work with MySQL/MongoDB, containerize with Docker, deploy on Kubernetes, and follow CI/CD and Agile practices while collaborating in a team.

Design, build, and maintain Java backend microservices using Spring Boot and JPA. Optimize SQL/PostgreSQL queries and stored procedures. Implement CI/CD pipelines, write unit/integration tests, and collaborate in English-speaking agile teams.

Design, implement, and maintain scalable Java backend services and APIs using Spring Boot. Collaborate with cross-functional teams, optimize performance, ensure security, integrate third-party services, write testable code, and maintain documentation.

Design, develop, and maintain server-side logic, databases, and RESTful APIs/microservices. Collaborate with front-end and product teams, ensure security, perform code reviews, troubleshoot issues, and participate across the software development lifecycle.

Backend developer role building and maintaining Java-based services using Spring, REST, and JPA. Work includes Oracle PL/SQL, messaging (ActiveMQ), caching (Redis), SOAP/WSDL, FileNet integration, CI/CD and automation (Jenkins, Ansible), containerization (Docker, Kubernetes), API gateway (Gravitee), Linux scripting, and collaborating with front-end frameworks (Angular/Vue).

Develop backend systems in C/C++ using pointers, function pointers, Pro*C with Oracle, STL and Boost. Implement multithreading, thread synchronization, design patterns (e.g., factory), dynamic casting, socket/TCP/IP programming, and architecture design. Java and AI knowledge are nice-to-have.

Design, configure, and support backend software and APIs; manage configuration files and environments; test and document API endpoints; collaborate on system data flow; participate in large-scale live data migrations (billions of records) into FinCloud; produce documentation and troubleshooting guides; work in agile teams and support integration and observability efforts.

Design and implement backend services for a Notification Hub: routing, preference sync, webhook ingestion, vendor adapters, Pub/Sub consumers, Avro processing, API integrations, resilience, and operational troubleshooting.