Blockchain Developer

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Blockchain Developer – Job Description

Role Overview

We are looking for a Blockchain Java Backend Developer responsible for designing, developing, and maintaining backend services that interact with blockchain networks. The ideal candidate should have strong experience in Java backend development, distributed systems, and blockchain technologies such as Ethereum or Hyperledger Fabric.

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

Technical Skills

• 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.

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