A community platform for creating and sharing ideal-type world cup games. The Next.js web service is wrapped in React Native WebView to serve web and app from a single codebase.
Web
Mobile App
Community
Period
2025.02 ~ ing
Type
Web / Mobile App
Role
Frontend Developer / Project Lead
Tool
Next.js, TypeScript, Tailwind CSS, Orval, TanStack Query, Zustand, Motion, GitHub Actions, Vercel, React Native (Expo), NextAuth, Storybook
WHAT I DID
- Led the project and built the entire web and WebView app as the sole frontend developer
- Split rendering per page with SSR, SSG, ISR, on-demand revalidation, and fetch cache in the App Router, and used streaming UI to speed up slow first paints on SSR pages
- Added FCM push, Kakao login, Android App Links, and offline error handling to the Expo WebView app, and automated EAS Update and internal test releases
- Moved media uploads to direct S3 presigned URL uploads to cut server traffic and load
- Set up Orval API code generation, GitHub Actions that report PR builds to Slack, and an n8n Slack digest of new games
- Kept shipping features after launch (account deletion, random play, recently played) and tracked user behavior with Google Analytics and Microsoft Clarity
Project Lead / Frontend
Jaemin Ko
Backend Developer
Hyeonho Park
Product Designer
Jinju Woo
FrontEnd Developer
KoJaem Portfolio
Copyright 2026. all rights reserved.