Built NutraPeak, a full e-commerce web application for a sports-supplements store featuring product catalog with advanced filtering and search, cart and 3-step checkout flow, wishlist, product comparison, deals with coupons, blog, and fake authentication with user profile, orders, and rewards. Implemented with React 19, TypeScript, Redux Toolkit, React Router 7, and Tailwind CSS v4 with localStorage persistence and fully responsive UI.