Engineer · ex-olympiad · systems that must survive the real world
Xinghan Yin 尹星寒
I don't build all that much — mostly systems that have to hold up once they meet the real world.
Came up through competitive programming, then drifted into infrastructure. Trading platforms, research tools, a handful of agents learning to divide the work — in the end it's the same job: dealing with the world outside the system's edge. Co-founder at GGBOYS, nominally the CTO, somewhere between New York and New Jersey.
Selected Work
featuredAbout
profileI'm Xinghan. The olympiad years taught me to be exact; the infrastructure years taught me to be paranoid.
Most of what I make has to stay alive in the real world — code that actually runs, citations that actually check out, exceptions that are graded, orders that don't get lost on the way. Small constraints, all of them. They happen to be about the only things I still trust.
By day, co-founder and CTO at GGBOYS, shuttling between New York and New Jersey. At night I write down the holes I've fallen into, and a little science fiction — the first is bookkeeping for my own mistakes; the second is probably just a boyhood dream I never finished and can't bring myself to throw out.
— more or less that kind of person. Not much else to say.
- Role
- CTO & Co-Founder · GGBOYS
- Focus
- AI infra · full-stack systems · real-time market data
- Base
- New York ⇄ New Jersey
- Stack
- TypeScript · Next.js · Nuxt / Vue · Python · Docker
- AI · LLM
- Claude Code · DeepSeek · multi-agent orchestration · prompt engineering
- Education
- M.S., NJIT (2023–2025) · Informatics Olympiad
- Contact
- [email protected]