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Yu-Wei (Jacky) Chang
Web3 Full-Stack Engineer | Smart Contract Security Researcher

👨‍💻 About Me

Hello! I’m Yu-Wei Chang, a Web3 Full-Stack Engineer with a security-first mindset.

I specialize in the modern Web3 stack (Foundry, Wagmi, Next.js) and have a deep passion for building secure decentralized applications and auditing DeFi protocols.

🚀 Technical Expertise & Execution

  • Full-Stack Mastery: Successfully built “Neon Marketplace”, handling everything from sophisticated smart contracts to seamless frontend integration.
  • Performance Optimization: Demonstrated strong engineering principles by optimizing a backend system by 400x.
  • System Architecture: Experienced in designing event-driven architectures capable of serving 5,000+ active users.

🛡️ Security & Auditing

Security is at the core of my development process. I am an active participant in the security community:

  • Active Researcher: Engaged in platforms like Codehawks and Immunefi.
  • Bug Bounty: Successfully identified critical logic flaws in the Lido protocol.

🛠️ My Tech Stack

  • Languages: Solidity, TypeScript/JavaScript
  • Frontend: Next.js, React, Tailwind CSS, Zustand
  • Smart Contracts: Foundry, OpenZeppelin, Chainlink, Security Audits
  • Web3 Tools: Wagmi, Viem, RainbowKit, Circle API
  • Infrastructure: AWS (EC2, Load Balancers), Docker, PostgreSQL

📬 Let’s Connect!

I am currently seeking Full-Stack Web3 roles where I can contribute to building the next generation of secure decentralized finance.