Jang-Ho Hwang
I've been writing software for a living since 1999. Along the way I've worked at game studios, a telecom, Kakao, and a few American companies, started a company of my own, and spent a stretch living off an app I built by myself. Frontend, backend, infrastructure, product, marketing: if something isn't getting done, I'd rather just do it myself, which is why the AI era has made me a genuinely happy person. These days I work fully remote from Berlin. This blog goes back to 2004.
I love writing code, so I commit to GitHub like a maniac.
What I'm building at work these days
- BizRouter An LLM gateway for Korean companies: one API key for a dozen AI providers, billed in won. I built everything from the Rust proxy to the admin console. These days new people are working on it, so my commits have slowed down.
- Wrks AI Image An image generator that doesn't require prompt skills. Pick a purpose, type in plain Korean, and you get an image.
- Wrks AI Video Describe a scene in Korean and get a short video, sound included.
- Wrks AI Notes Transcribes meeting recordings by speaker and pulls out decisions and action items.
The last three I build alone, from planning and design through development, operations, and infrastructure. In between, I put newly released models on H100s to see what they can do.
Things I build for myself
- Anvil A dictation, TTS, and chat server that runs on my Mac with no cloud. One shortcut from the menu bar for voice input anywhere. Python with MLX, FastAPI, React.
- Morax An iOS app that turns spoken thoughts into tasks, events, and notes. Audio is transcribed on the device and never leaves it. SwiftUI, Bun with Hono, SQLite.
- Burrow A messenger for iOS and macOS made for a handful of close friends. Passkey sign-in, photos, videos, and calls. SwiftUI, Rust with PostgreSQL, WebSocket.
- Butter A personal app for habits, notes, and photos. The server accepts client certificates only. Rust with PostgreSQL, Flutter.
My older iOS apps, Mouton Journal, and Orrery are on the works page.