iOS & Swift engineer based in Seoul, building things people actually use.

Currently working on Azar at @hyperconnect — connecting millions of people around the world through live video.

I've shipped 30 apps so far. Some hit the charts, some taught me hard lessons, all made me a better engineer.

I build apps and occasionally open-source the interesting parts.

• Pastel — Gradient animation effects like Instagram (3.5k+)
• Gradients — A curated collection of 180+ splendid gradients (800+)
• Comets — Animating particles for your app (600+)
• HypeUI — SwiftUI-like syntax for UIKit
• Passcode — Simple and clean passcode UI (250+)

Also contributed to RxSwift and am part of the communities behind Moya, RxSwiftCommunity, ReSwift, SwifterSwift, MessageKit, and danger.