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CodeMitra 🚀

AI-Assisted Developer Collaboration Platform

CodeMitra is a full-stack developer platform inspired by Stack Overflow, built to support Q&A, real-time collaboration, AI-assisted coding, and secure user interactions. The system is designed with a backend-first, scalable architecture, focusing on performance, security, and extensibility.

Live: https://code-mitra-ad.vercel.app/ Backend-focused system built and maintained by Aditya Sharma

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🎯 Project Objective

The goal of CodeMitra is to build a scalable developer community platform that supports:

• Structured Q&A workflows
• Secure authentication and authorization
• Real-time collaboration and communication
• AI-assisted developer productivity
• Performance optimization using caching and rate limiting

This project emphasizes backend engineering, distributed system concepts, and API design.

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✨ Key Features

Core Platform

• Ask & Answer system with structured questions and answers
• Tag-based categorization and search
• User profiles and role-based access (Admin / User)

Authentication & Security

• JWT-based authentication
• Google OAuth 2.0 using Passport.js
• Role-Based Access Control (RBAC)
• API rate limiting to prevent abuse
• Secure headers via Helmet
• Input validation using Express Validator

Performance & Scalability

• Redis-based caching and session management
• Optimized MongoDB schemas and indexes
• Stateless REST APIs
• Centralized error handling and logging

Real-Time & AI Capabilities

• Real-time communication using Socket.io
• AI-powered endpoints using Google Gemini APIs
• Asynchronous workflows for AI responses and processing

Media & Utilities

• Image uploads using ImageKit
• Email notifications using Nodemailer
• File handling via Multer

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🧠 System Architecture (High Level)

Client (React + Vite)
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        v
REST APIs (Express.js)
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Authentication & Authorization
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Business Logic Layer
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MongoDB  <---->  Redis (Cache / Sessions)
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External Services (AI, ImageKit, Email)

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🛠️ Tech Stack

Frontend

• React 19 (Vite)
• Redux Toolkit + Redux Persist
• Tailwind CSS
• Socket.io Client
• Axios
• Monaco Editor (Code Editor)
• Radix UI / Headless UI

Backend

• Node.js (ES Modules)
• Express.js
• MongoDB + Mongoose
• Redis (ioredis)
• Socket.io
• Passport.js (Google OAuth)
• JWT Authentication
• Express Session
• Express Rate Limit
• Helmet, CORS, Morgan

External Services

• Google Gemini (GenAI)
• ImageKit (Media Storage)
• Nodemailer (Email)
• Judge0 API (Code Execution – configured)

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📁 Backend Structure (Simplified)

backend/
├── config/           # Environment & app configuration
├── routes/           # API route definitions
├── controllers/      # Request handling logic
├── services/         # Passport, AI, Redis, external services
├── models/           # MongoDB schemas
├── middlewares/      # Auth, validation, rate limiting
├── utils/            # Helper utilities
├── app.js            # Express app configuration
└── server.js         # Server entry point

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⚙️ Environment Variables (Backend)

Create a .env file in backend/:

PORT=3000
MONGODB_URI=mongodb://localhost:27017/CodeMitra

JWT_SECRET=your_secret
JWT_EXPAIRE_IN=1d

REDIS_HOST=localhost
REDIS_PORT=6379
REDIS_PASSWORD=

GOOGLE_CLIENT_ID=your_id
GOOGLE_CLIENT_SECRET=your_secret
GOOGLE_CALLBACK_URL=/api/auth/google/callback

GEMINI_API_KEY=your_key

IMAGEKIT_PUBLIC_KEY=your_key
IMAGEKIT_PRIVATE_KEY=your_key
IMAGEKIT_URL=your_url

EMAIL_USER=your_email
EMAIL_PASSWORD=your_password

BASE_URL=http://localhost:5173

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▶️ Installation & Setup

1. Clone Repository

git clone https://github.com/Adit122022/CodeMitra.git
cd CodeMitra

2. Backend Setup

cd backend
npm install
npm start

3. Frontend Setup

cd frontend
npm install
npm run dev

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🔐 Authentication Flow (Simplified)

1. User authenticates via Email/Password or Google OAuth
2. JWT issued and stored securely
3. Protected routes validated via middleware
4. Role-based access enforced at API level

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🛣️ Roadmap

Feature	Status
Core Q&A System	✅ Completed
JWT Authentication	✅ Completed
Google OAuth	✅ Completed
Role-Based Access Control	✅ Completed
Redis Caching	✅ Completed
Rate Limiting & Security	✅ Completed
AI Integration	✅ Completed
Real-Time Collaboration	⏳ In Progress
Notification System	📝 Planned
Collaborative Code Execution	📝 Planned

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🧪 Engineering Focus Areas

• API design & security
• Backend scalability & caching
• Distributed system fundamentals
• Async workflows
• Clean architecture & separation of concerns

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👤 Author

Aditya Sharma 📧 Email: adity122022@gmail.com 🐙 GitHub: https://github.com/Adit122022

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📄 License

MIT License

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