Java Backend Developer with Blockchain (Full Time)

Job Title: Java Backend Developer with Blockchain

Location: New York City, NY Onsite

Experience Level:10 years

Employment Type: Full-time

Key Responsibilities

• Design and develop backend services and APIs using Java (Spring Boot or similar frameworks)
• Integrate blockchain networks (Ethereum, Hyperledger, or similar) into backend systems
• Build and maintain secure, scalable, and high-performance microservices
• Develop and interact with smart contracts (Solidity or similar languages)
• Optimize system performance, reliability, and scalability
• Implement security best practices for blockchain and backend systems
• Collaborate with cross-functional teams including frontend developers, QA, and DevOps
• Troubleshoot, debug, and upgrade existing systems
• Write clean, maintainable, and well-documented code

Required Skills & Qualifications

• Strong experience in Java development (Java 8+ preferred)
• Hands-on experience with Spring Boot, Spring MVC, and RESTful APIs
• Good understanding of blockchain concepts (consensus mechanisms, cryptography, wallets, transactions)
• Experience working with blockchain platforms such as Ethereum, Hyperledger Fabric, or similar
• Familiarity with smart contract development (Solidity is a plus)
• Experience with databases (PostgreSQL, MySQL, or NoSQL databases)
• Knowledge of microservices architecture and distributed systems
• Experience with version control systems (Git)
• Strong problem-solving and debugging skills