Custom E-Commerce Website Development

I’m looking for a secure, scalable e-commerce site built from the ground up rather than on a hosted platform such as Shopify, WooCommerce or Magento. The goal is to give both buyers and sellers a smooth experience while keeping full control over the codebase, design, and future growth of the site... (Budget: $30 - $250 CAD, Jobs: Database Management, eCommerce, HTML, JavaScript, Next.js, Node.js, PHP, Software Architecture, Web Development, Website Design)