Custom-Coded E-Commerce Website Build

I’m launching a full e-commerce website and want every line of it written in clean, well-documented custom code rather than relying on Shopify, WooCommerce, Magento, or any other off-the-shelf solution... (Budget: ₹250000 - ₹500000 INR, Jobs: Backend Development, eCommerce, Frontend Development, Next.js, Payment Gateway Integration, PostgreSQL, Web Development, Website Design)