I built a real-time competitive coding platform — Dev-Battle

Source: Dev.to

Introduction

Solo coding practice gets stale. I wanted something with real stakes — a platform where two developers compete live on the same problem, under the same clock.

That’s Dev-Battle.

How a match works

• Create or join a lobby
• Problem is broadcast to both players
• Write and submit your code
• Sandboxed runner judges the output
• AI feedback is shown in the arena
• XP and leaderboard rankings update live

Features

• Real-time rooms — synchronized match state via WebSockets, low‑latency updates
• Sandboxed execution — isolated runners for safe, reproducible judging
• AI feedback — hints and notes without giving away the answer
• Progression system — XP, achievements, and a global leaderboard
• Monorepo architecture — shared types and codegen keep client and server in sync

Stack

What’s next

Spectator mode, tournament brackets, team modes, and a more polished mobile UI are all on the roadmap. Contributions and feedback are very welcome!

GitHub | Live Demo

Have questions about the architecture or built something similar? Drop a comment!