Develop a full-fledged e-commerce website where users can browse products, add them to their cart, and complete purchases. Use HTML, CSS, and JavaScript for the frontend, and implement backend functionality using a framework like Flask or Django with a database system like PostgreSQL. Incorporate features such as user authentication, product search, filtering, and a checkout process with payment integration (e.g., Stripe). This project will provide hands-on experience with both frontend and backend development and simulate real-world e-commerce scenarios.