Full Stack Engineer - Web3 & Blockchain

As a Full Stack Engineer at E-Commerce Collections, you will build and scale decentralised applications, smart contracts, and the web platforms that sit on top of them. You'll work across frontend, backend, and on-chain development, bringing practical knowledge of smart contract security, wallet integrations, gas optimisation, and production-grade dApp architecture. You'll also contribute to AI/ML training initiatives by evaluating AI-generated code and technical solutions.

What you'll do

• Design, develop, test, and deploy end-to-end decentralised applications across frontend, backend, and smart contract layers
• Write, audit, and optimise smart contracts in Solidity (and/or Rust for non-EVM chains) with a focus on security, gas efficiency, and upgradeability
• Build responsive, user-friendly web interfaces using React, Next.js, and TypeScript, with seamless wallet connectivity and transaction flows
• Develop backend services and APIs using Node.js or similar to index, process, and serve on-chain and off-chain data
• Integrate with blockchain networks, RPC providers, oracles, indexers such as The Graph, and Web3 libraries such as ethers.js, viem, or web3.js
• Evaluate smart contracts and dApps for security vulnerabilities, including reentrancy, access control flaws, front-running, and oracle manipulation
• Analyse gas usage, transaction costs, and contract execution to identify bottlenecks and recommend optimisations
• Evaluate AI-generated code, smart contracts, and technical solutions for correctness, security, and reliability
• Develop and execute test cases (unit, integration, and fork tests) to assess the behaviour, consistency, and robustness of on-chain and off-chain systems
• Identify technical errors, inconsistencies, edge cases, and limitations in blockchain and full stack implementations
• Contribute to AI/ML training initiatives by evaluating model responses, preparing technical problem statements, and providing structured feedback
• Research emerging blockchain protocols, Layer 2 solutions, standards, and development tools
• Document technical findings, architecture decisions, security considerations, and implementation approaches
• Collaborate with engineering teams to improve the performance, security, and reliability of Web3 products

What you bring

• Bachelor's or Master's degree in Computer Science, Software Engineering, Information Technology, or a related technical field
• 4+ years of professional experience in full stack development, including at least 2 years building production Web3 or blockchain applications
• Strong programming skills in JavaScript/TypeScript and Solidity
• Hands-on experience with frontend frameworks such as React or Next.js, and backend development with Node.js
• Proven experience writing, testing, and deploying smart contracts on Ethereum or other EVM-compatible chains
• Experience with smart contract development frameworks such as Hardhat or Foundry
• Practical experience with Web3 libraries (ethers.js, viem, or web3.js) and wallet integrations (MetaMask, WalletConnect, or similar)
• Strong understanding of blockchain fundamentals, including consensus, transactions, gas, token standards (ERC-20, ERC-721, ERC-1155), and contract upgradeability patterns
• Solid knowledge of smart contract security best practices and common attack vectors
• Experience with databases (PostgreSQL, MongoDB, or similar), REST/GraphQL APIs, and Git-based workflows
• Strong analytical, debugging, and problem-solving abilities
• Ability to evaluate technical trade-offs involving security, gas cost, performance, scalability, and user experience
• Excellent research, technical communication, and documentation skills
• Fluency in English
• Availability to work night shift

Nice to have

• Experience with non-EVM ecosystems such as Solana (Rust/Anchor), Cosmos, or Polkadot
• Exposure to Layer 2 and scaling solutions such as Arbitrum, Optimism, Base, Polygon, or zkEVMs
• Familiarity with DeFi protocols (DEXs, lending, staking, AMMs), NFTs, or DAO governance mechanisms
• Experience with smart contract auditing, static analysis, or fuzzing tools such as Slither, Mythril, or Echidna
• Knowledge of cross-chain bridges, account abstraction (ERC-4337), or zero-knowledge proofs
• Experience with cloud platforms (AWS, GCP), Docker, and CI/CD pipelines
• 3+ years of experience in machine learning or AI model training, technical evaluation, or AI-assisted development

What we offer

• Salary of ₹1.8L-₹2.3L per month
• Full-time, night shift role
• Remote work