Kaizen is a premium full-stack SaaS platform designed for trading analytics, built with a modern and scalable architecture. I developed a complete SaaS product from scratch including: - Landing page with advanced animations (Three.js, Framer Motion) - Authentication system (NextAuth, JWT, Google OAuth) - Subscription system with Paddle (monthly/yearly + free trial) - User dashboard with billing and settings - Admin panel with analytics, charts, and user management - Secure API with rate limiting and role-based access (USER / ADMIN / SUPERADMIN)