I’m setting up a standalone e-commerce site aimed at Indian buyers and I need the full source code, not a hosted SaaS solution. The build must include a secure, well-tested Paytm payment gateway so customers can pay with UPI, cards, or wallets without ever leaving the checkout flow. Here’s what I expect: • Clean, modular code in a modern stack (React or Vue for the front end, Node/Express, Laravel, or Django on the back end—choose what you’re fastest with). • Responsive storefront, product pages, cart, and checkout. • Admin panel for product, order, coupon, and inventory management. • Fully integrated Paytm sandbox for test transactions and easy switch to production keys. • Comprehensive developer documentation and a quick install guide so I can deploy on my own VPS. A brief screen-share or video walkthrough at hand-off will help me see the setup in action and confirm everything works from add-to-cart through successful Paytm payment and order confirmation.