Blockchain Developer
Key Infotek Llc
Jersey City, NJ, United States
about 2 months ago
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Role details
Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Experience level
Experienced
Experience required
2 years minimum
Working hours
Regular working hours
Job source
Tech stack
Java (Programming Language)
Collaborative Software
DevOps
Digital Signature
Enterprise Architecture Framework
Key Management
Node.Js
Public Key Infrastructure
Queueing Systems
RabbitMQ
Blockchain
Software Engineering
+11 more
Backend
Event Driven Architecture
Hyperledger
Containerization
Kubernetes
Information Technology
Solidity
Apache Kafka
Web3.js
Asynchronous Programming
Docker
Requirements
- Bachelor’s degree in Computer Science, Engineering, or a related discipline; MS is a plus
- 8+ years of overall software engineering experience, with a strong backend development foundation
- 2 to 4 years of hands-on experience in Web3 and blockchain application development, including smart contract development and blockchain protocol integration
- 3 to 5 years of experience with backend development using Java/Spring, Node.js, or equivalent enterprise frameworks
- Proficiency in Solidity smart contract development, including testing frameworks (Hardhat, Foundry, Truffle) and security best practices
- Hands-on experience with Web3 libraries such as Web3J, Web3JS, Ethers.js, or Viem
- Solid understanding of blockchain fundamentals consensus mechanisms, transaction lifecycle, gas models, wallet infrastructure, and key management
- Experience with token standards (ERC-20, ERC-721, ERC-1155, ERC-3525, or equivalent) and tokenization patterns
- Familiarity with permissioned blockchain networks (Hyperledger Besu, Fabric, Corda, or R3) is a strong plus
- Experience with asynchronous programming, event-driven systems, and message queuing (Kafka, RabbitMQ, or equivalent)
- Familiarity with DevOps practices, containerization (Docker, Kubernetes), and CI/CD pipelines
- Understanding of cryptographic concepts digital signatures, hashing, PKI, and secure key management as applied to blockchain systems
- Exposure to Layer 2 scaling solutions (Polygon, Optimism, zkSync, etc.) and cross-chain interoperability protocols is a plus
- Experience in financial services or regulated industries is a plus
- Familiarity with Agile/Scrum methodologies and distributed team collaboration tools
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