👋 Hi, I'm
Sangwook Han.

A software engineer based in Seoul, maintaining app-tech services with 40,000+ MAU at an adtech startup. Flutter is my primary tool — but I choose, learn, and apply the right technology based on the problem and its business value.

Contact → GitHub
Where I work
2025.10 — Now
Snapplay
Flutter Developer

Joined as the first mobile engineer at an app-tech startup — developing and operating 3 app-tech services with a combined 40,000+ MAU, and maintaining the company's shared internal libraries.

Tech stack
Mobile & Frontend
Flutter Dart iOS Swift SwiftUI
Backend
Spring Boot Spring WebFlux Kotlin MySQL MongoDB Redis
DevOps & Tools
Docker GitHub Actions Firebase Supabase AWS REST API
Open source
grabber_sheet ◆ pub.dev 🔥 418+ downloads in 3 weeks

A Flutter bottom-sheet package with a built-in drag handle and flexible snapping.

View on pub.dev →
Highlights
🏆
3rd place — Vibe Coding Hackathon
Flutter Korea 2025 · project “run-fit”
💻
Competitive programming ◆ Platinum V · AC 1600
Active problem solver on Baekjoon Online Judge (BOJ) · solved.ac
👥
Co-Founder — A&I developer community
Mentored 20+ students over 3 years
Contact
Email
sangwook@snapplay.io GitHub
@SangWook16074 Blog
velog.io/@qazws78941