Custom E-Commerce Site Development

I’m launching an online store for physical goods and want the site built from the ground up rather than on Shopify, WooCommerce or Magento. A clean, maintainable code-base is essential so that future features can be added without platform constraints.

Top priority is a fully secure payment-gateway integration that supports credit-cards and the usual wallets. Beyond that I’ll need the standard shopping-cart flow coded (add, update, remove, checkout) and a straightforward product catalogue that I can expand later. Responsive layouts, SEO-friendly routing and clear admin panels for inventory and order tracking should be baked in rather than tacked on.

Please outline the stack you’d propose, the gateway APIs you’ve integrated before, and an estimated timeframe for first deployment to a live server. A short demo of similar custom e-commerce builds will help me choose quickly.