Building JudGO: The High-Performance Online Judge for the Next Gen of Coders

go dev.to

JudGO

JudGO is a competitive programming platform built for real-time play.

It combines:

  • A fast Go backend (Clean Architecture)
  • Real-time state and sync using Firebase RTDB
  • A modern React frontend optimized for coding duels and practice

Key advantages

Area What JudGO does better
Real-time duels Room-based matches where progress updates live, designed for competitive sessions
Product UX Integrated arena + practice + dashboard with a consistent, modern UI
Backend speed Go services with clear separation of domain, service, repo, and transport layers
Data model RTDB-first design for instant updates and multiplayer state

Feature overview

Feature Notes
Practice submissions Attempts tracking and solved state
Dashboard statistics Aggregated stats from real user activity
Multiplayer rooms Lobby, countdown, and room game lifecycle
Multi-task room games Multiple problems per game, per-user progress
Judge pipeline Dev-mode judging available; production isolation is a separate hardening step

Architecture

Folder Responsibility
cmd/ App entry points
internal/domain/ Business models
…

Source: dev.to

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