Blockchain Developer

Key Responsibilities

• Design and develop secure, scalable backend services in Java to interact with blockchain networks.
• Build RESTful APIs and microservices to support blockchain-based applications.
• Develop and integrate smart contracts using blockchain platforms such as Ethereum or Hyperledger Fabric.
• Implement transaction processing, wallet integration, and blockchain node communication.
• Ensure security, cryptography, and data integrity in blockchain applications.
• Optimize system performance for high-throughput distributed environments.
• Collaborate with frontend developers, DevOps teams, and blockchain architects.
• Write unit tests, integration tests, and documentation.
• Participate in architecture discussions and code reviews.

Required Skills & Qualifications

• Strong experience with Java backend development (Java 8+).
• Experience with frameworks such as Spring Boot or Spring Framework.
• Hands-on experience with blockchain platforms like:
• Ethereum
• Hyperledger Fabric
• Corda (optional).
• Experience with smart contracts (e.g., Solidity).
• Knowledge of cryptography, consensus mechanisms, and distributed ledgers.
• Experience building REST APIs and microservices.
• Familiarity with Docker, Kubernetes, and cloud platforms.
• Experience with relational or NoSQL databases.

Preferred Skills

• Experience with Web3 libraries such as Web3j.
• Knowledge of DeFi, NFTs, or token standards (ERC-20 / ERC-721).
• Experience with CI/CD pipelines and DevOps practices.
• Understanding of event-driven architecture and messaging systems.

Education

• Bachelor’s or Master’s degree in Computer Science, Information Technology, or related field.