Blockchain Developer

About the Role

Blockchain Engineer

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.