Company Name: Techchain AI

Job Details: 18,Locations,Remote,180K-200K,Annually,Mid,level

Job Url: https://builtin.com/job/blockchain-engineer/7770384

Job Description: About the RoleWe are looking for a skilled and innovative Blockchain Engineer to join our team and help build the core on-chain infrastructure for our Web3 gaming ecosystem. You will design smart contracts, enable multi-chain interoperability, build staking systems, and integrate wallets and NFTs across multiple EVM and non-EVM chains.This is a key position for driving the blockchain foundation of our platform.Responsibilities- Design, develop, and deploy smart contracts (Solidity, Rust) supporting staking, NFTs, and in-game assets.- Implement multi-chain integrations across EVM-compatible networks and Solana.- Develop secure and gas-optimized staking, bridging, and token mechanisms.- Integrate wallet functionality (MetaMask, Phantom, WalletConnect) into Web and Mobile apps.- Build backend services that interact with blockchain nodes and smart contracts.- Perform smart contract audits, threat modeling, and vulnerability assessments.- Research and implement new Layer 2, rollups, and multi-chain scalability solutions.- Collaborate with Full Stack, DevOps, and Product teams on architecture and deployment.- Support NFT minting pipelines, metadata storage, royalties, and marketplace logic.- Maintain blockchain documentation, SDKs, and technical specifications.Preferred Qualifications- 3+ years experience with Solidity, Rust, Smart Contracts.- Strong experience with Web3.js / ethers.js, Hardhat, Truffle, Anchor, or Foundry.- Deep understanding of EVM, Solana, NFTs, ERC-20, ERC-721, ERC-1155 standards.- Experience with staking, liquidity pools, DeFi mechanics, and yield logic.- Familiarity with Layer 2 technologies (zkSync, Arbitrum, Optimism, Polygon).- Experience integrating blockchain systems with Node.js, TypeScript, or Python.- Security-focused mindset with experience mitigating common smart contract vulnerabilities.