YongJoon

.dev

Developer · Creative · Seoul

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about

I build
things
that matter.

Full-stack developer with a passion for clean code, strong design, and building experiences that people actually want to use. Based in Seoul, working globally.

stack
  • TypeScript
  • React / Next.js
  • Node.js
  • Rust
  • PostgreSQL
  • Docker / K8s
years
7+ exp
project

Flowboard

Real-time collaborative whiteboard with conflict-free sync engine.

TypeScript · WebSocket · Canvas
code
"Ship it, then perfect it."
project

Rustify CLI

Fast file-processing toolkit built in Rust. 10x faster than shell scripts.

Rust · CLI · Performance
contact

Let's build
something.

hello@yongjoon.dev
open source
40+ repos
CREATE
BUILD
SHIP
ITERATE
YJ
— made with code & conviction