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I am a Senior Full-Stack Engineer with expertise in building decentralized applications (dApps) on EVM and Solana ecosystems. With extensive experience in smart contract development, I have successfully architected and delivered complex Web3 solutions using technologies like React, Node.js, TypeScript, and Web3.js. I specialize in integrating smart contracts with dApps, ensuring smooth interactions between Web2 systems and decentralized protocols. I am passionate about leveraging industry-leading tools such as IPFS, The Graph, and Alchemy, focusing on enhancing transaction efficiency, scalability, and security. Adept at managing client relationships and project timelines, I have a proven track record of optimizing gas costs, improving performance, and driving user engagement.…I am a Senior Full-Stack Engineer with expertise in building decentralized applications (dApps) on EVM and Solana ecosystems. With extensive experience in smart contract development, I have successfully architected and delivered complex Web3 solutions using technologies like React, Node.js, TypeScript, and Web3.js. I specialize in integrating smart contracts with dApps, ensuring smooth interactions between Web2 systems and decentralized protocols. I am passionate about leveraging industry-leading tools such as IPFS, The Graph, and Alchemy, focusing on enhancing transaction efficiency, scalability, and security. Adept at managing client relationships and project timelines, I have a proven track record of optimizing gas costs, improving performance, and driving user engagement.

Henry Tsang

Blockchain Developer, Full Stack Developer, Web Developer, +3

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I am a Senior Full-Stack Engineer with expertise in building decentralized applications (dApps) on EVM and Solana ecosystems. With extensive experience in smart contract development, I have successfully architected and delivered complex Web3 solutions using technologies like React, Node.js, TypeScript, and Web3.js. I specialize in integrating smart contracts with dApps, ensuring smooth interactions between Web2 systems and decentralized protocols. I am passionate about leveraging industry-leading tools such as IPFS, The Graph, and Alchemy, focusing on enhancing transaction efficiency, scalability, and security. Adept at managing client relationships and project timelines, I have a proven track record of optimizing gas costs, improving performance, and driving user engagement.…I am a Senior Full-Stack Engineer with expertise in building decentralized applications (dApps) on EVM and Solana ecosystems. With extensive experience in smart contract development, I have successfully architected and delivered complex Web3 solutions using technologies like React, Node.js, TypeScript, and Web3.js. I specialize in integrating smart contracts with dApps, ensuring smooth interactions between Web2 systems and decentralized protocols. I am passionate about leveraging industry-leading tools such as IPFS, The Graph, and Alchemy, focusing on enhancing transaction efficiency, scalability, and security. Adept at managing client relationships and project timelines, I have a proven track record of optimizing gas costs, improving performance, and driving user engagement.

Available to hire

I am a Senior Full-Stack Engineer with expertise in building decentralized applications (dApps) on EVM and Solana ecosystems. With extensive experience in smart contract development, I have successfully architected and delivered complex Web3 solutions using technologies like React, Node.js, TypeScript, and Web3.js. I specialize in integrating smart contracts with dApps, ensuring smooth interactions between Web2 systems and decentralized protocols.

I am passionate about leveraging industry-leading tools such as IPFS, The Graph, and Alchemy, focusing on enhancing transaction efficiency, scalability, and security. Adept at managing client relationships and project timelines, I have a proven track record of optimizing gas costs, improving performance, and driving user engagement.

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Work Experience

Senior Blockchain & Smart Contract Engineer at Metasalt

October 1, 2023 - Present

Led smart contract development for NFT marketplaces, swap, and bridge functions focusing on Real-World Asset tokenization within DeFi protocols. Integrated Layer-2 solutions like Optimism and Arbitrum to improve scalability, reduce gas fees, and enhance transaction efficiency on Ethereum and other EVM chains. Developed lazy-minted NFTs and Klick Token solutions to bolster token interoperability with RWAs. Conducted audits using tools such as Slither and OpenZeppelin libraries, optimizing gas costs by 30% and ensuring compliance with security best practices. Collaborated closely with clients to understand requirements and ensure timely delivery of impactful solutions.

Senior Blockchain & Full Stack Engineer at Metasalt

October 1, 2023 - August 6, 2025

Spearheaded cross-chain interoperability for token swaps enabling seamless blockchain interactions and enhancing platform flexibility. Developed front-end applications using React.js and Next.js focused on DeFi features like staking, yield farming, and liquidity pools, ensuring smooth user experiences on web and mobile. Led cloud deployment and containerization with Docker and Kubernetes, optimizing scalability and reducing downtime during peak traffic. Built React and React Native components for blockchain-based identity management integrating Cosmos SDK and Tendermint. Deployed Web3 applications on Vercel, optimizing performance and scalability. Collaborated with cross-functional teams to implement security best practices protecting user data and interactions in decentralized finance protocols while actively engaging clients to improve platform performance and user experience.

Senior Blockchain Developer at Vaultik

December 1, 2022 - August 6, 2025

Led development initiatives for blockchain solutions focusing on integrating smart contracts with decentralized applications. Optimized platform performance and developed scalable blockchain identity management features. Collaborated with clients and backend engineers to transform business needs into secure and usable technical implementations enhancing user engagement.

Blockchain & Full Stack Developer at Green Bay TokenMind

October 1, 2020 - August 6, 2025

Developed and maintained front-end and back-end blockchain applications, integrating complex smart contracts to support DeFi solutions and token economies. Worked on improving gas efficiencies and ensuring security best practices. Supported client communication to align technical implementations with business goals.

Senior Blockchain & Smart Contract Engineer at Metasalt

October 1, 2023 - Present

Led smart contract development for NFT marketplaces, swap, and bridge functionalities focusing on Real-World Asset tokenization within DeFi protocols. Integrated Layer-2 solutions such as Optimism and Arbitrum to improve scalability and reduce gas fees on Ethereum and other EVM chains. Developed and deployed lazy-minted NFTs and Klick Token solutions to enhance token interoperability with real-world assets. Conducted smart contract audits using Slither and OpenZeppelin libraries, optimizing gas costs by 30% and ensuring security best practices. Collaborated closely with clients to understand technical and business requirements for aligning projects and ensuring timely delivery of high-impact solutions.

Senior Blockchain & Full Stack Engineer at Vaultik Green Bay TokenMind

October 1, 2023 - August 6, 2025

Spearheaded cross-chain interoperability for token swaps to facilitate seamless blockchain interactions and improve platform flexibility. Developed front-end applications using React.js and Next.js focused on DeFi features such as staking, yield farming, and liquidity pools while ensuring smooth user experience on web and mobile interfaces. Led cloud deployment and containerization with Docker and Kubernetes to optimize application scalability and reduce downtime during traffic peaks. Created React and React Native components for blockchain-based identity management using Cosmos SDK and Tendermint. Collaborated with backend engineers to integrate blockchain identity management for streamlined user authentication and access control. Deployed Web3 applications on Vercel, enhancing front-end performance and scalability in production. Partnered with teams to implement security best practices and safeguard user data within DeFi protocols. Actively engaged with clients to provide technical e

Senior Blockchain & Smart Contract Engineer at Metasalt

October 1, 2023 - Present

Led smart contract development for NFT marketplaces, swap, and bridge functionalities emphasizing Real-World Asset (RWA) tokenization within DeFi protocols. Integrated Layer-2 solutions such as Optimism and Arbitrum to enhance scalability, reduce gas fees, and improve transaction efficiency on Ethereum and other EVM chains. Developed lazy-minted NFTs and Klick Token solutions to facilitate token interoperability with real-world assets. Conducted smart contract audits using Slither and OpenZeppelin libraries, achieving a 30% gas cost optimization while ensuring compliance with industry security standards. Maintained close collaboration with clients to align technical and business requirements for timely and impactful project delivery.

Senior Blockchain & Full Stack Engineer at Vaultik Green Bay TokenMind

September 30, 2023 - August 6, 2025

Spearheaded cross-chain interoperability for token swaps, enabling seamless blockchain interactions and enhancing platform flexibility. Developed front-end applications using React.js and Next.js focusing on DeFi features such as staking, yield farming, and liquidity pools, ensuring smooth experiences on both web and mobile platforms. Led cloud deployment and containerization using Docker and Kubernetes, optimizing scalability and minimizing downtime during peak traffic periods. Collaborated closely with clients to translate business needs into technical solutions, improving user engagement and platform usability. Built React and React Native components for blockchain-based identity management systems using Cosmos SDK and Tendermint, streamlining user authentication and access control. Deployed Web3 applications on Vercel, enhancing front-end performance under high user traffic. Worked with cross-functional teams to implement security best practices within DeFi protocols and actively e

Senior Blockchain & Smart Contract Engineer at Metasalt

May 1, 2025 - August 6, 2025

Led smart contract development for NFT marketplaces, swap, and bridge functionalities, focusing on Real-World Asset (RWA) tokenization within DeFi protocols. Integrated Layer-2 solutions like Optimism and Arbitrum for improved scalability, reduced gas fees, and enhanced transaction efficiency on Ethereum and other EVM chains. Developed and deployed lazy-minted NFTs and Klick Token solutions, enhancing token interoperability with real-world assets. Conducted smart contract audits using Slither and OpenZeppelin libraries, optimizing gas costs by 30% and ensuring adherence to industry security best practices. Collaborated closely with clients to understand technical and business requirements, ensuring project alignment and timely delivery of high-impact solutions.

Senior Blockchain & Full Stack Engineer at Vaultik Green Bay TokenMind

October 1, 2023 - August 6, 2025

Spearheaded cross-chain interoperability for token swaps, facilitating seamless blockchain interactions and improving platform flexibility. Developed front-end applications using React.js and Next.js, focusing on DeFi interactions like staking, yield farming, and liquidity pools, while ensuring a smooth user experience across web and mobile interfaces. Led cloud deployment and containerization efforts using Docker and Kubernetes, optimizing application scalability and reducing downtime during high-traffic periods. Worked directly with clients to translate their business needs into actionable technical solutions, improving user engagement and platform usability. Built and maintained React-based front-end components for decentralized applications, focusing on enhancing user interaction with blockchain-based identity solutions. Designed and developed React/React Native components for blockchain-based identity management systems using Cosmos SDK and Tendermint. Collaborated closely with ba

Senior Blockchain Developer at Vaultik

December 1, 2022 - August 6, 2025

Blockchain & Full Stack Developer at Green Bay TokenMind

October 1, 2020 - August 6, 2025