Blockchain Web3 Developer

We are seeking an experienced Blockchain / Web3 Developer who will design, build, test and deploy smart contracts, integrate them with front-end and back-end systems, and ensure high standards of security, performance, and usability. You will collaborate with product, UX, frontend, and backend teams to deliver production-ready features, contribute to architecture decisions, and continuously improve our Web3 stack. Key Responsibilities • Design, write, and deploy secure smart contracts • Implement token standards (ERC-20, ERC-721, ERC-1155) and upgradeable contracts using libraries like OpenZeppelin • Optimise contracts for gas usage, performance, and security, including audits and peer reviews • Integrate Web3 libraries with front-end applications and wallets • Develop backend services / APIs that interact with on-chain and off-chain data. • Work with Layer 2 / roll-ups / scaling solutions, bridges, and/or cross-chain integrations where required • Write automated tests, maintain CI/CD pipelines, and ensure robust coverage and code quality • Maintain clear technical documentation, and mentor more junior engineers Requirements • 5 - 8+ years experience in blockchain / Web3 development • Strong Solidity skills; experience with EVM chains; familiarity with non-EVM is desirable • Proficiency in Web3 tools: Hardhat, Truffle, Foundry, etc. • Experience with front-end technologies (React, Next.js )and backend • Good grasp of REST / GraphQL APIs, database work (SQL / NoSQL), and decentralised storage • Solid understanding of Web3 security best practices • Ability to work in an agile, collaborative team; good communication skills in English Desirable Extras • Experience with gas-efficient contract design and Layer-2 roll-ups • Prior exposure to zero-knowledge proofs, account abstraction, or decentralised identity (DID) systems • Open source contributions or code samples / portfolio of deployed smart contracts or projects • Experience in marketplace / escrow / auction mechanics