hobin — iOS Developer

About

I'm a Seoul-based iOS developer with 6+ years of experience building and scaling consumer-facing apps at top Korean tech companies. I care deeply about performance, clean architecture, and delightful user experiences.

Currently building KakaoPage, Tapas, and KakaoWebtoon at Kakao Entertainment — apps used by millions across Asia and the US.

Outside of work, I explore new technologies through open source side projects and write technical articles on Medium.

0+ Years iOS

0 Companies

0 App Store Apps

0 Open Source Libs

Skills

iOS Code

Swift UIKit

iOS UI

SwiftUI AVFoundation

Concurrency

Combine Swift Concurrency RxSwift

Cross-Platform

React Native JavaScript Python Ruby

Tools

Git Firebase Xcode JIRA

Projects

▶

SwiftAVPlayer

Swift AVFoundation Combine UIKit

A comprehensive iOS media player with playback controls, real-time progress tracking, variable speed, and Combine-based state management.

GitHub

🎰

SlotMachineAnimator

Swift UIKit Core Animation

A lightweight UIKit-based slot machine animator for iOS with precise, customizable spin-to-index control.

GitHub

⚡

Sendable-Concurrency

Swift Swift Concurrency Sendable

Explores the Sendable protocol and structured concurrency for writing safe, concurrent Swift code in real-world scenarios.

GitHub

Experience

Kakao Entertainment

iOS Developer 2020 — Present

Building webtoon and novel apps for global audiences across Asia and the US.

KakaoPage Tapas KakaoWebtoon

Improved AVPlayer performance by 40% through deep optimization
Built iOS Ad Framework, adopted by Melon, KakaoWebtoon, and KakaoPage
Led VisionOS prototype project and attended Apple Lab Sessions
Supported global app launch (Taiwan, Thailand, Indonesia)
Authored 8+ technical documents on iOS development
Developed 7 standalone pages and a slot-machine animation feature

Swift Combine AVPlayer SwiftUI Swift Concurrency RxSwift Firebase VisionOS

FnGuide

iOS Developer 2018 — 2020

Financial data and stock app development for enterprise clients.

Managed full app lifecycle — planning, development, database, App Store deployments
Supported iOS, Android, React Native, and backend (C#, ASP.NET)
Built internal apps that replaced manual SMS alerts with push notifications
Independently handled certificate renewals and executive-level tech presentations

Swift Objective-C React Native C# Node.js Oracle DB