Square E-Commerce Storefront Design Build

I need a clean, responsive e-commerce site built from the ground up to sell a range of physical products. The look and feel should be modern, load quickly on mobile, and make it effortless for shoppers to browse, add items, and check out securely... (Budget: $250 - $750 USD, Jobs: eCommerce, HTML, Magento, PHP, Shopify, Web Development, Website Design, WooCommerce)