Optimized Electronics E-Commerce Build

I’m ready to launch an online store focused exclusively on consumer electronics, and I want the site to load fast, rank well, and convert visitors into buyers. The build must follow best-practice performance and SEO principles so that pages stay lean even as the catalogue grows... (Budget: €30 - €250 EUR, Jobs: eCommerce, HTML, Inventory Management, Payment Gateway Integration, SEO, Shopping Cart Integration, Web Development, Website Design)