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Yu-Wei (Jacky) Chang
Backend Engineer | Cloud & Infrastructure Enthusiast

👨‍💻 About Me

Hello! I’m Yu-Wei Chang, a Software Engineer specializing in backend development and cloud infrastructure.

I’m passionate about building high-performance systems and have a genuine love for troubleshooting — the “detective work” of tracing logs, diagnosing root causes, and resolving complex technical blockers.

🚀 Technical Expertise & Execution

  • Backend & Performance Optimization: Architected and optimized a mission-critical data pipeline using RabbitMQ and Node.js, boosting processing speed by 400x (20s → 0.05s) for a healthcare system.
  • System Architecture: Designed event-driven architectures serving 5,000+ active users.
  • Troubleshooting & Root Cause Analysis: Skilled in deep-dive debugging, analyzing distributed systems to identify bottlenecks and enhance stability.

🛡️ Reliability-First Mindset

I believe in building systems that are stable, maintainable, and observable:

  • Proactive Monitoring: Experience setting up logging and alerting for production systems.
  • Debugging Complex Issues: Finding critical deadlocks and logic flaws in distributed systems.

🛠️ My Tech Stack

  • Languages: TypeScript/JavaScript, Node.js, Solidity
  • Backend: Express.js, NestJS, RabbitMQ
  • Frontend: Next.js, React, Tailwind CSS
  • Cloud & Infrastructure: AWS (EC2, Load Balancers), Docker, PostgreSQL
  • Web3: Smart Contract Development, DeFi Protocol Analysis, Security Auditing (Foundry)

🔐 Additional Background: Blockchain & Security

Beyond traditional backend work, I have hands-on experience in the Web3/blockchain space:

  • Participated in smart contract security research and bug bounty programs
  • Deep understanding of DeFi protocols (AMM mechanisms, stablecoin design)
  • Technical writing on blockchain security topics (see my blog posts!)

I’m open to opportunities that bridge traditional backend engineering with blockchain technology.

📬 Let’s Connect!

I am currently seeking Backend / Cloud Infrastructure / Web3 roles where I can contribute to building reliable and scalable systems.