Full-Stack Ecommerce Website Build

I need a production-ready online store that sells physical products and feels as smooth on mobile as it does on desktop. Core pages—home, category, product detail, cart, and checkout—should load quickly, pass basic Core Web Vitals, and be wrapped in a modern, conversion-friendly design... (Budget: €250 - €750 EUR, Jobs: API Integration, Full Stack Development, HTML, PHP, Shopify, Web Development, Website Design, WordPress)