Job Description
Blockchain Java Backend Developer Tata Consultancy Services•3.9 Jersey City, NJ Job Details $100,000•$130,000 a year 3 hours ago Qualifications Blockchain Scalable systems Microservices RBAC Docker Scalability System architecture design Kafka Distributed computing Multithreading Network security Full Job Description Blockchain Java Backend Developer Must Have Technical/Functional Skills Core Backend Skills Strong proficiency in Java (8+), and frameworks such as Spring Boot / Spring Cloud. Experience building distributed systems and microservices architectures at scale.
Strong knowledge of:
o Concurrency, multithreading, asynchronous programming o API design (REST/gRPC), security (OAuth2/JWT), and integration patterns Solid understanding of data stores: o SQL (PostgreSQL/MySQL) and/or NoSQL (MongoDB/Cassandra) o Caching (Redis) and search (Elasticsearch) is a plus Hands-on experience with message streaming/queues: Blockchain Skills (Must-Have) Strong understanding of blockchain fundamentals: o Transactions, blocks, confirmations/finality, consensus, gas/fees, wallets, keys. Experience integrating backend services with blockchain networks/nodes: o Ethereum-compatible networks (Ethereum/Polygon/BSC) using Web3j, ethers-style approaches o and/or permissioned chains (Hyperledger Fabric, Corda, Quorum) Experience supporting large blockchain deployments: o Node connectivity, RPC management, event indexing, chain reorg handling, retry strategies. ________________________________________ DevOps / Cloud (Preferred) Experience with Docker and Kubernetes for containerized microservices deployments. CI/CD exposure (Jenkins/GitHub Actions/GitLab CI/Azure DevOps). Cloud experience (Azure/AWS/GCP) is a plus. Understanding of security practices:
o Secrets management (Vault/KMS), TLS, RBAC, network security. Roles & Responsibilities Design and develop Java-based backend services that interact with blockchain networks and nodes (public or permissioned). Build and scale microservices-based architecture supporting blockchain transaction workflows, event processing, and off-chain components. Develop reliable services for:
o Transaction orchestration o Smart contract invocation o Blockchain event subscription/listening o On-chain/off-chain data synchronization Implement scalable APIs (REST/gRPC) for blockchain-enabled products and integrations. Optimize performance for high throughput and low latency: o Transaction throughput handling, batching, retries, idempotency, rate limiting. Ensure secure integration with blockchain:
o Key management best practices, signing transactions, secure secret handling. Implement observability and reliability standards:
o Logging, monitoring, tracing, alerting, SLOs/SLAs. Work with DevOps/SRE teams to support production deployments, incident triage, and capacity planning. Contribute to architecture decisions including:
o Event-driven architecture (Kafka/RabbitMQ), caching strategies, database selection, and deployment topologies. Salary Range•$100,000•130,000 a year Location Jersey City, NJ Job Function TECHNOLOGY
Role Engineer Job Id 413128 Desired Skills Java Salary Range $100,000•130,000 a year Desired Candidate Profile Qualifications :
BACHELOR OF COMPUTER
SCIENCE
