Mr. Latte Story
A Freelance Developer, from Planning to Launch
I build web and mobile products in Seoul. Since 2002, I have helped turn ideas into working products, from defining the scope to development, launch, and operation.
- Since 2002Building products
- Since 2005Writing tech
- Since 2008Running this site
- 22Own products shipped
- 80+Client projects
- 4Patents & Papers
Latest Writing
What Is One Day of My Life Worth?
When incremental computation beats recomputing everything
The PyTorch Lightning PyPI supply chain attack that was stopped in 42 minutes
Latest News
Opening the Front Door to AI Agents: Sierra and Meta's Personal Agent Protocol
Claude output is already watermarked, and OpenAI API users have to opt in
arXiv caps submitters at two papers a month, and rejected papers count
Selected Products
Products I planned, built, and continue to run.
- Typdit - An editor where words fall into place: a screen to write in right away, and an embed in one line
- DeepThought - A mind map studio for reading annotated maps and forking them into your own drafts
- BootSignal - Drop-in tool workshop: QR, D-Day, countdown & comment widgets in one line
How I Can Help
- Turn an idea into a scoped MVP.
- Build and launch web, mobile, and backend applications.
- Review an existing product or codebase and identify useful applications of AI.
Support
Looking for a product partner or a lecture?
Founders, teams, businesses: from problem framing to launch, plus development lectures shaped for teams and schools.