Hey! I’m Won.

I’m a harness engineer at OpenAI, where I build the Codex harness that serves as core of all agentic products at OpenAI.

Previously, I worked on coding data at Scale AI and DevOps agents at ByteDance. Prior to all, I was a philosophy student at Carnegie Mellon where I focused on the philosophy of mind, until junior year when I decided to learn computer science.

I care most about good design—whether it's systems, experiences, or visuals; I spent my whole life before college preparing for design school, so that remains to be a part of me to this day.