Hi, I’m Mark!

I’m a backend-focused Fullstack Developer based in San Jose, CA, specializing in scalable Node.js applications and production system architecture.

Recently shipped: Lingput.dev - an AI-powered language learning platform where I reduced API response times by 85% and built async job queue systems handling concurrent AI processing.

🚀 Recent Achievements:

• Reduced application load time from 600 ms to 85 ms (-85.8%) by implementing caching for frequent database queries.
• Resolved UI blocking issue during long-running story generation (~30s) by implementing a background job queue with BullMQ + Redis and streaming real-time progress updates to the frontend.
• Developed automated CI/CD pipeline, reducing deployment time from 25 minutes to 5 minutes through full automation.
• Eliminated 1.3s request latency during accessToken refresh by migrating session management from relational DB to Redis.
• Architected clean, testable backend with layered architecture (Controller/Service/Repository) and dependency injection

When I’m not building production-ready systems, I’m exploring the world - I’ve been to 25 countries and counting! 🌍 Coding has been my passion since I got my first computer at age 6.

💼 Open to backend and full-stack developer roles - let’s connect on LinkedIn !