Built LinkZip, a production-ready AI-powered Smart Link Routing SaaS platform using React.js, Node.js, Express.js, MongoDB, Redis, and Razorpay. Key features: • AI-powered smart link routing • Real-time analytics dashboard • JWT authentication and role-based access control (RBAC) • Team collaboration and invitation system • Subscription billing with Razorpay • Redis caching for improved performance • Responsive UI with modern dashboard • RESTful APIs and scalable backend architecture Technologies: React.js, Node.js, Express.js, MongoDB, Redis, JWT, Razorpay, JavaScript, HTML, CSS.