Blockchain Developer

About the Role We are seeking an experienced Blockchain Engineer who can design, develop, and deploy secure, scalable, and high-performance blockchain solutions. The ideal candidate has deep knowledge of blockchain protocols, smart contract development, cryptographic foundations, distributed system architecture, and hands-on experience with modern Web3 technologies. This role involves end-to-end blockchain development — from protocol-level design to smart contract coding, network setup, security, testing, and integration with backend systems. Key Responsibilities 1. Blockchain Development & Architecture Design and implement blockchain solutions based on Ethereum, Hyperledger, Solana, Polygon, or other networks. Develop high-quality smart contracts using Solidity, Rust, Go, or Vyper. Build decentralized applications (dApps) with secure, scalable architecture. Implement Layer 2 solutions, sidechains, rollups, or interoperability protocols. 2. Smart Contract Engineering Write secure, gas-optimized smart contracts. Conduct smart contract unit testing, integration testing, and QA. Perform audits and vulnerability checks (reentrancy, overflow, logic flaws). Deploy and manage contracts using tools like Hardhat, Truffle, Foundry, or Brownie. 3. Blockchain Infrastructure & Nodes Manage blockchain nodes, networks, and infrastructure. Set up validators, miners, or staking nodes on public/private chains. Monitor and optimize node performance, uptime, and security. 4. API, Backend & Web3 Integration Integrate blockchain solutions with frontend/backend via Web3.js, Ethers.js or custom APIs. Build RESTful/GraphQL APIs for blockchain interactions. Implement wallet connectivity, transaction flows, and signing mechanisms. 5. Security, Compliance & Cryptography Apply best practices in cryptography including hashing, digital signatures, encryption. Implement authentication, access control, and key management. Ensure compliance with blockchain security frameworks and audit standards. 6. Performance, Scalability & Optimization Optimize smart contracts for gas usage and performance. Implement caching layers, indexing services (The Graph), or scalable data access. Work on solutions for high-throughput use cases (DeFi, NFT marketplaces). 7. Research & Innovation Stay current with latest blockchain protocols, tooling, and industry trends. Evaluate new technologies to improve system reliability and performance. Create technical documentation, architecture diagrams, and best practices. Required Skills & Qualifications Technical Skills Languages: Solidity, Rust, Go, JavaScript/TypeScript, Python. Blockchain Platforms: Ethereum, Hyperledger Fabric, Solana, Polygon, Avalanche. Smart Contract Tools: Hardhat, Truffle, Foundry, Ganache, OpenZeppelin. Web3 Frameworks: Web3.js, Ethers.js, Wagmi, Viem. Node & Infrastructure: Geth, OpenEthereum, IPFS, Storj, Infura, Alchemy. Databases: MongoDB, PostgreSQL, Redis, LevelDB. DevOps/CI: Docker, Kubernetes, Terraform, GitHub Actions. Strong understanding of cryptographic algorithms , consensus mechanisms , and token standards (ERC20, ERC721, ERC1155, SPL) . Soft Skills Excellent problem-solving and analytical mindset. Strong communication and ability to explain complex concepts clearly. Ability to work in fast-paced Web3 environments. Commitment to clean code, documentation, and teamwork. Preferred Qualifications Experience in DeFi protocols, NFT platforms, DEXs, wallets, or staking systems. Understanding of blockchain scalability solutions (zk-Rollups, Optimistic Rollups). Knowledge of Zero-Knowledge Proofs, zk-SNARKs, zk-STARKs. Familiarity with cloud platforms (AWS, GCP, Azure). Contributions to open-source Web3 projects.