Contact me through: [email protected], +82-10-5682-0426

See this page on your browser: Resume - Cheolho Jeon

Experience

Coupang - Staff Mobile Engineer (Native Android)

2025.02-current

As a staff mobile engineer, Coupang, E-Commerce Engineering, Productivity & AI Innovations

• Develop and manage the Coupang app, across most domains (e.g. excluding CouPay for legal constraints etc.)
• Lead large-scale technical innovations (e.g. new login flow), productivity enhancements (e.g. custom MCPs), explored and adopted multiple SOTA tools (DSPy, langfuse etc.)
• Heavily leading, participating in productivity boost via AI tools across multiple domains.
• Our stack is MVVM + Kotlin + XML, I’m currently leading internal compose migration.
• Currently we are using Rx, but I’m leading internal coroutines adoption.

VTOV - Software Engineer (Native Android)

2021.11-2025.02

As a software engineer, VTOV, Engineering team, I

• Develop and manage the <Deli app> for drivers to aid their package pickup & delivery from scratch, end-to-end from the CI/CD pipeline to deployment, as an only client Android engineer.
• Design the SW architecture with flexibility and maintainability in mind. 99.9% Kotlin MVVM architecture with Compose, Navigation, Hilt, and Junit 4 based Unit testing.
• UI code is written in Compose with Jetpack Navigation. Safe Args with Hilt are used so that we could maximize type safety, testability, and reusability.
• Strictly followed separation of concern: Communication is done via Repositories that communicate with RESTful API (Retrofit) and MQTT servers (Paho). Business logic is written in Android VMs.
• Utilized Kotlin Coroutines and Flow for effective management of asynchronous programming.