URL Shortener
The URL Shortener Application is a full-stack project built with TypeScript, featuring a blazing-fast React frontend and a high-performance Express.js backend powered by MongoDB + Redis. Designed with scalability, caching, and security at its core, this app goes beyond just shortening links — it tracks real-time clicks, provides live analytics, and ensures lightning-fast redirections with Redis-backed caching. 🚀 Key Highlights Core URL Shortening — Create short links with unique 5–6 character base62 codes. Smart Redirection — Ultra-fast lookups with Redis caching and MongoDB indexing. Live Analytics Dashboard — Auto-refreshing stats showing clicks, creation date, and original URLs. Collision-Proof Logic — Built-in retries, salt-based uniqueness, and ObjectId-based encoding. Enterprise-Grade Performance — Redis atomic counters for real-time click tracking. Optimized caching strategies (7-day URLs, 1-hour stats, 1-day counters). Rate limiting & graceful shutdown handling. Secure by Default — Input validation, sanitization, Helmet headers, CORS, and error-safe responses. Developer Friendly — End-to-end TypeScript. Jest testing with in-memory MongoDB. Hot reloading for a smooth DX. 📊 Why It Stands Out Unlike basic URL shorteners, this project was designed for production-grade scalability — balancing real-time performance, robust caching, analytics, and security. The frontend offers a beautiful, responsive UI with smooth animations, while the backend is a battle-tested Express.js API optimized for large-scale usage. 🏗️ Tech Stack Frontend: React 19, TypeScript, Vite Backend: Express.js, Node.js, TypeScript Database: MongoDB with Mongoose ODM Caching Layer: Redis (atomic ops, TTL strategies) Testing: Jest, MongoDB Memory Server Tooling: ESLint, Prettier, Hot Reloading ⚡ Built as a showcase of full-stack engineering with a focus on performance, scalability, and developer experience.