I am an innovative and detail-oriented Senior Blockchain Engineer with over 6 years of experience designing, developing, and deploying smart contracts and decentralized applications on EVM-compatible chains, Solana, and Cosmos SDK. I specialize in Layer 1 and Layer 2 architectures, DeFi protocols, cross-chain interoperability, NFT marketplaces, and secure blockchain integrations. I am also adept in full-stack development, cloud infrastructure, and DevOps workflows. I have contributed to mission-critical projects at Chainlink and OpenSea and have a strong academic foundation from Tsinghua University. Currently, I am a Founding Engineer at GreenBay, building multi-chain decentralized payment and donation platforms integrating EVM, Solana, and Cosmos SDK, with expertise in smart contract audit, security, and cloud services integration.

Henry Zhang

I am an innovative and detail-oriented Senior Blockchain Engineer with over 6 years of experience designing, developing, and deploying smart contracts and decentralized applications on EVM-compatible chains, Solana, and Cosmos SDK. I specialize in Layer 1 and Layer 2 architectures, DeFi protocols, cross-chain interoperability, NFT marketplaces, and secure blockchain integrations. I am also adept in full-stack development, cloud infrastructure, and DevOps workflows. I have contributed to mission-critical projects at Chainlink and OpenSea and have a strong academic foundation from Tsinghua University. Currently, I am a Founding Engineer at GreenBay, building multi-chain decentralized payment and donation platforms integrating EVM, Solana, and Cosmos SDK, with expertise in smart contract audit, security, and cloud services integration.

Available to hire

I am an innovative and detail-oriented Senior Blockchain Engineer with over 6 years of experience designing, developing, and deploying smart contracts and decentralized applications on EVM-compatible chains, Solana, and Cosmos SDK. I specialize in Layer 1 and Layer 2 architectures, DeFi protocols, cross-chain interoperability, NFT marketplaces, and secure blockchain integrations. I am also adept in full-stack development, cloud infrastructure, and DevOps workflows.

I have contributed to mission-critical projects at Chainlink and OpenSea and have a strong academic foundation from Tsinghua University. Currently, I am a Founding Engineer at GreenBay, building multi-chain decentralized payment and donation platforms integrating EVM, Solana, and Cosmos SDK, with expertise in smart contract audit, security, and cloud services integration.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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Work Experience

Founding Engineer at GreenBay
January 1, 2024 - Present
Built a multi-chain decentralized payment and donation platform using EVM, Solana, and Cosmos SDK. Designed and deployed smart contracts for seamless token flow, compliance, and on-chain settlements. Integrated cloud services from IBM, AWS, and Tencent to support enterprise-graded deployments. Developed a React/Node.js dashboard for analytics, donations, and account management. Led architecture decisions and smart contract audits for maximum security and performance.
Senior Smart Contract Engineer at Chainlink Labs
December 1, 2023 - August 5, 2025
Contributed to the development of Chainlink Staking v0.2, focusing on validator logic and economic security. Engineered enhancements to Chainlink VRF and Data Streams, improving reliability and randomness delivery. Collaborated on Cross-Chain Interoperability Protocol (CCIP), building cross-chain messaging contracts. Actively reviewed and optimized contracts for gas efficiency and audit readiness.
Senior Blockchain & Full Stack Developer at Opensea
October 1, 2022 - August 5, 2025
Spearheaded smart contract architecture for NFT minting, listing, and trading (ERC-721 & ERC-1155). Built and maintained full-stack features using React, Node.js, and PostgreSQL. Integrated third-party wallet providers and Chainlink oracles for price feeds. Led incident response and patching for smart contract vulnerabilities and system-level issues. Mentored junior developers on smart contract standards and best practices.
Founding Engineer at GreenBay
January 1, 2024 - Present
Built a multi-chain decentralized payment and donation platform using EVM, Solana, and Cosmos SDK. Designed and deployed smart contracts for seamless token flow, compliance, and on-chain settlements. Integrated cloud services from IBM, AWS, and Tencent to support enterprise-grade deployments. Developed a React/Node.js dashboard for analytics, donations, and account management. Led architecture decisions and smart contract audits for maximum security and performance.
Senior Smart Contract Engineer at Chainlink Labs
December 1, 2023 - August 5, 2025
Contributed to the development of Chainlink Staking v0.2 focusing on validator logic and economic security. Engineered enhancements to Chainlink VRF and Data Streams improving reliability and randomness delivery. Collaborated on Cross-Chain Interoperability Protocol (CCIP) building cross-chain messaging contracts. Actively reviewed and optimized contracts for gas efficiency and audit readiness.
Senior Blockchain & Full Stack Developer at OpenSea
October 1, 2022 - August 5, 2025
Spearheaded smart contract architecture for NFT minting, listing, and trading (ERC-721 & ERC-1155). Built and maintained full-stack features using React, Node.js, and PostgreSQL. Integrated third-party wallet providers and Chainlink oracles for price feeds. Led incident response and patching for smart contract vulnerabilities and system-level issues. Mentored junior developers on smart contract standards and best practices.

Education

Bachelor of Science in Computer Science at Tsinghua University-Beijing
September 1, 2013 - October 1, 2017
Bachelor of Science in Computer Science at Tsinghua University-Beijing
September 1, 2013 - October 1, 2017

Qualifications

Certified Blockchain Developer - Blockchain Council
January 1, 2020 - August 5, 2025
AWS Certified Solutions Architect - Associate
January 1, 2021 - August 5, 2025
Chainlink Smart Contract Mastery Certificate
January 1, 2023 - August 5, 2025
Certified Blockchain Developer - Blockchain Council
January 1, 2020 - August 5, 2025
AWS Certified Solutions Architect - Associate
January 1, 2021 - August 5, 2025
Chainlink Smart Contract Mastery Certificate
January 1, 2023 - August 5, 2025

Industry Experience

Computers & Electronics, Financial Services, Software & Internet, Professional Services