I'm Changhyuk Ban.

I build AI products from Korea 🇰🇷

Solo founder. No VC, no team, no bullshit. Inspired by Pieter Levels, I'm building multiple AI products in public.

Journey

• 2026.04 — Started mrban.io (going public)
• 2026.03 — Launched AtoZAI (Korean AI coding platform)
• 2026.01 — Started vibe coding & solo building
• 2024 — Started reading habit. 300 books in 3 years (still counting)
• 2005~ — 20 years of full-stack development

What I believe

• Ship fast. Ugly is fine.
• Build in public. Numbers don't lie.
• Solve your own problems first.
• Stay solo as long as possible.
• Korea has builders the world doesn't know yet.
• And Korean cultural IP — like Saju (4 pillars) — is undervalued globally.
• Show your thinking, not just your results. That's what firms can't do.

What I'm not

• Not a native English speaker. My English is functional, not fluent. I ship anyway.
• Not a marketing expert. I'm learning by doing in public.
• Not VC-funded. Bootstrapped while running a corporate CEO day job.

Reach me