hellojun
Fullstack Blockchain Developer
Fullstack Blockchain Developer with 14 years of software development experience, including 7 years in blockchain and exchange wallet engineering and 7 years in large-scale distributed systems.
Skilled in building secure and scalable crypto applications with expertise across backend (Golang, Node.js, Solidity) and frontend (Next.js, React.js, Web3.js, Ethers.js).
Proven track record in designing custodial/non-custodial wallets, developing NFT & DeFi dApps, and integrating wallet solutions with modern web technologies. Passionate about delivering user-friendly, high-performance blockchain products.
Experience: 3 years
Yearly salary: $60,000
Hourly rate: $30
Nationality: 🇨🇳 China
Residency: 🇨🇳 China
Experience
Fullstack Blockchain Developer
1Box 2021 - 2023
Led architecture design and smart contract development for an NFT marketplace. Built 1bitpay MPC wallet enabling secure multi-party custody of private keys. Developed Ethereum smart contracts (ERC-721, ERC-20) and integrated with frontend apps. Implemented dApp frontend using Next.js and Web3.js, enabling wallet login (Metamask, WalletConnect). Collaborated with backend and frontend teams to deliver end-to-end Web3 solutions.
Blockchain Technology Expert
BHEX Exchange (Huobi-backed), Shanghai 2018 - 2021
Designed hot, warm, and cold wallet architecture with secure transaction workflows. Developed and optimized hot wallet systems ensuring 99.99% uptime. Integrated wallets with exchange frontend APIs for smooth user deposits/withdrawals. Collaborated with frontend engineers to ensure seamless UX for crypto transactions.
Skills
solidity
english
chinese-mandarin