My Online Judge

An Online Judge platform where users can submit code in multiple languages (C++, Java, Python), get it compiled and evaluated, and view results — just like LeetCode, HackerRank, or Codeforces.

This project features:

- 👨‍💻 Code editor with syntax highlighting for multiple languages

- 📤 Code submission and execution engine

- 📊 Evaluation based on predefined test cases

- 🔐 User roles (admin, user) and secure login/signup

- 🌐 Full-stack architecture (MongoDB + Node.js + React + Docker)

📽️ Demo

👉 Watch Demo Video

🧱 Project Structure

project-root/
│
├── BackEnd/                   # Node.js backend with code execution logic
│   ├── index.js
│   ├── Dockerfile
│   └── .env                   # For MongoDB URI, ports, etc.
│
├── FrontEnd/
│   └── onlinejudge/           # Vite + React frontend
│       ├── Dockerfile
│       ├── vite.config.js
│       └── src/
│
├── docker-compose.yml         # Spin up MongoDB, backend, and frontend
└── README.md

🚀 Features

🔧 Manual Local Setup (without Docker)

> Only if you don't want Docker

🖥️ Backend

cd BackEnd

npm install

npm start

- Backend runs on: http://localhost:3002

Ensure you have MongoDB running locally or update the .env with your connection string.

💻 Frontend

cd FrontEnd/onlinejudge

npm install

npm run dev

- Frontend runs on: http://localhost:5173

🐳 Docker Setup (Recommended)

Prerequisites

- Docker & Docker Compose installed

🧪 Quick Start

From the root of the project

docker-compose up --build

⛓️ Ports Used

🗃️ MongoDB Data Persistence

MongoDB uses Docker volumes so that your data is safe even after shutdown:

volumes:
  mongo-data:

You can explore it using MongoDB Compass:

📬 API Endpoints

⚖️ License

MIT License. See LICENSE file for details.