I operate mobile services at 40,000+ MAU, contributing to stable, reliable development through test automation, architecture design, and performance optimization. I wrote 1,350+ tests to reach 77.04% business-logic coverage, and cut test execution time by 46.4% with a parallel test runner.
Flutter
Dart
iOS
Swift
SwiftUI
Spring Boot
Spring WebFlux
Kotlin
MySQL
MongoDB
Redis
Docker
GitHub Actions
Firebase
Supabase
AWS
REST API
Building the “Everyone's Challenge” service within Cashwalk — a nationwide healthcare app-tech service with 4.7M+ DAU.
Joined as the first mobile engineer at an app-tech startup — developed and operated 3 app-tech services with a combined 40,000+ MAU, and maintained the company's shared internal libraries.
