engineer · co-founder of GGBOYS
Xinghan Yin
With AI getting so good at coding, being able to write clean, reliable code yourself doesn't seem to count for as much anymore. You can spend hours on something, even hundreds of hours, and that effort can feel pretty small next to what AI can do. Ideas seem to matter more now.
I'm always coming up with ideas. Some of them are pretty out there. Now that it takes less time and money to turn an idea into a product, I get to try mine out every day.
Selected Systems
shippedMore Work
videos, writing, small buildsWriting / Notes
engineering writeupsAbout
profileI'm Xinghan Yin, based in the New York / New Jersey area.
Most of my time goes to GGBOYS, a real-time digital-asset marketplace I co-founded. I lead the engineering: trading, escrow, market data and risk are mostly my code, and I keep them running in production. I build with AI coding agents (Claude Code and Codex), and every change goes the same way: read the code, write a plan, have other models review the plan, then run an eight-dimension audit before it ships. I wrote MemTree when the codebase got too big to keep in my head. It holds the notes the agents read before they edit a file.
I came up through competitive programming. The bugs I worry about most are the silent ones: a wrong value written to the database, no error, nothing in the logs. GGBOYS takes real card payments, so that audit checks money handling and concurrency on every change.
- Role
- Co-founder · led engineering · GGBOYS (2025–present)
- Focus
- Real-time marketplace · full-stack · backend · iOS · AI coding-agent workflows
- Based
- New York ⇄ New Jersey · open to remote
- Stack
- Python · TypeScript · Vue / Nuxt · FastAPI · PostgreSQL / Redis · Docker · Swift / SwiftUI
- AI · LLM
- Coding agents · multi-agent orchestration · evals · agent memory
- Education
- M.S. Software Engineering, NJIT (2023–2025)