CatCode

CatCode is a real-time 1v1 coding battle platform with a cat-themed UI. Players can queue for matches, challenge friends, chat, and compete in timed coding duels with live updates.

What CatCode Offers

• Real-time coding battles (5/10/20 minute modes)
• Global matchmaking queue
• Private challenge rooms (friends only)
• Friends list + direct friend chat
• Leaderboard + profile stats + achievements/badges
• AI code review with Gemini
• Code execution via Piston or Judge0
• Firebase authentication (email/password + Google)

Tech Stack

Frontend

• React 19
• TypeScript
• Vite
• Monaco Editor (@monaco-editor/react)
• Firebase Web SDK
• React Router

Backend

• FastAPI
• WebSockets
• Redis (state, queue, lobby, presence, notifications)
• httpx for provider integrations
• pydantic + pydantic-settings

External Services

• Firebase Auth
• Gemini API
• Piston API / Judge0 API

Deployment

• Frontend: Vercel
• Backend: Render
• Redis: Managed Redis URL

Clone

git clone https://github.com/pydevkrishna/CatCode.git
cd CatCode