Blockchain Developer (Crypto Wallet Engine)

Job Description

Position: Blockchain Developer Location: Noida, Sector 62 Employment Type: Full-Time (Work From Office) Experience Required: 3 to 5 Years in Blockchain Development Domain: Payment Platform About the Role: We are looking for a highly skilled Blockchain Developer with hands-on experience in crypto wallet engine development and integration . The ideal candidate will be responsible for designing, building, and maintaining secure blockchain-based applications, with a focus on wallet infrastructure, smart contracts, and decentralized transaction systems . Key Responsibilities: Design, develop, and maintain crypto wallet engines supporting multi-currency storage, secure transactions, and key management. Integrate blockchain nodes and APIs for leading networks such as Bitcoin, Ethereum, Polygon, Solana, and Binance Smart Chain . Implement wallet functionalities including address generation, transaction signing, encryption, and UTXO management . Develop and deploy smart contracts and DApps using Solidity, Rust, or similar blockchain programming languages. Manage on-chain and off-chain data synchronization, encryption, and transaction validation. Optimize system performance while ensuring security compliance for all wallet operations. Collaborate closely with backend, frontend, and DevOps teams to deploy blockchain applications at scale. Conduct code reviews, perform automated testing, and maintain detailed technical documentation. Technical Skills: Blockchain Platforms: Ethereum, Bitcoin, Polygon, Solana, Binance Smart Chain Programming Languages: Solidity, Go, Python, Node.js, Rust Tools & Frameworks: Truffle, Hardhat, Remix, Web3.js, Ethers.js Wallets: HD Wallets, Multi-Signature Wallets, MPC Wallets Databases: MongoDB, PostgreSQL, Redis Version Control: Git, GitHub, GitLab Security: Encryption Standards, HSM, Key Management, Transaction Signing APIs & Integrations: RESTful APIs, GraphQL, WebSocket, Blockchain Node APIs Preferred Experience: Experience with wallet backend services such as transaction engines, fee estimation, and nonce management. Implementation of multi-signature or MPC wallets and custodial/non-custodial solutions. Familiarity with blockchain explorers, indexers, and ledger synchronization services . Contributions to open-source blockchain projects are highly appreciated. Required Qualifications: Bachelor?s Degree (B.Tech/B.E.) in Computer Science, Engineering, or a related field. Proven expertise in blockchain technologies (Ethereum, Bitcoin, Polygon, Solana, etc.). Hands-on experience with crypto wallet engine or custody platforms such as Fireblocks, BitGo, or Gnosis Safe. Soft Skills: Strong analytical and problem-solving skills. Ability to work both independently and within agile teams. Excellent communication and documentation skills. Committed to writing clean, secure, and maintainable code.