LeetCode-style Competitive Coding & AI Tutor Platform

I build a complete LeetCode-style Competitive Coding Platform
from scratch — fully production-ready and deployed on AWS EC2.

What's included:

Backend (Node.js + Express.js):
- REST APIs for problems, users, submissions
- Judge0 integration for real-time code execution
- Multi-language support (C++, Python, Java, JavaScript)
- JWT authentication (Login & Signup)
- Admin panel for problem management
- Submission history and result tracking
- CORS handling and security best practices
- Database schema design with MongoDB/PostgreSQL

Frontend (React.js):
- Homepage, Admin Page, Code Editor
- Monaco/CodeMirror editor integration
- Login/Signup UI with auth flow
- Problem listing with difficulty filters
- Real-time submission feedback
- Responsive, clean UI with Tailwind CSS

AI Features:
- AI Chatbot integrated inside the editor
- Hints and code suggestions using LLM
- Finalized AI assistant for problem solving

Video Integration:
- Video lectures section built and debugged
- Complete video frontend + backend

Deployment:
- Deployed on AWS EC2 instance
- Configured with Nginx reverse proxy
- Production-ready with high uptime

Total Development: 25+ hours of building,
debugging, and deploying — battle-tested and
ready to ship to your users.