Software engineer · Indie maker · Seoul
I've been building software since 2002. I take ideas from the first sketch through design, development, launch, and the everyday work of keeping a product useful.
My work spans web platforms, mobile apps, games, and developer tools. I'm especially interested in practical AI and automation that help people create and get things done. I share what I build and what I learn along the way.
Website ↗ · 한국어 ↗ · Writing (한국어) ↗ · Writing (English) ↗ · Get in touch ↗
A few things I've built for other builders.
| Project | What it does |
|---|---|
| cafe-skills | A workflow for coding agents, from a clear task to implementation and verification. |
| lipcode | A terminal coding agent built in Rust, with local models and optional cloud providers. |
Products I design, build, and run.
- Typdit — A browser writing editor with AI tools and embeddable editing.
- DeepThought — Annotated mind maps for exploring ideas, making them your own, and sharing them.
- BootSignal — Comments, upvotes, ratings, and other widgets for websites.
Have an idea to bring to life, a product to improve, or an interesting tool to build together? I'd be happy to connect.