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Blockchain Java Backend Developer - Tata Consultancy Services (TCS)
Backend Engineer
Senior Blockchain Java Backend Developer building scalable microservices with Spring Boot, REST/gRPC APIs, and secure OAuth2 authentication, while integrating PostgreSQL, Redis, and blockchain fundamentals into distributed systems.
About the role
Key Responsibilities
- Design, develop, and maintain high‑performance Java microservices using Spring Boot and Spring Cloud.
- Implement secure REST and gRPC APIs, applying OAuth2/JWT authentication and fine‑grained authorization.
- Build and optimize distributed systems, leveraging concurrency, multithreading, and asynchronous patterns.
- Integrate relational (PostgreSQL/MySQL) and NoSQL (MongoDB/Cassandra) data stores, and implement caching with Redis.
- Develop and consume message streams and queues, ensuring reliable event‑driven communication.
- Apply blockchain fundamentals to design and implement distributed ledger components and smart‑contract interactions.
Requirements
- 5+ years of Java (8+) development experience with Spring ecosystem.
- Proven track record in building microservices at scale, including API design and security best practices.
- Strong knowledge of SQL/NoSQL databases, caching, and search technologies.
- Hands‑on experience with message streaming/queueing systems (Kafka, RabbitMQ).
- Solid understanding of blockchain concepts and experience integrating blockchain solutions.