Shopify Speed & Accessibility Boost

My Shopify store is ready for a performance and accessibility tune-up focused primarily on the product pages. I need an experienced developer who can dive into the theme code, installed apps, and page assets to squeeze out every millisecond of speed while making the site friendlier to all users... (Budget: £20 - £250 GBP, Jobs: Accessibility, Graphic Design, HTML, Payment Gateway Integration, Performance Tuning, Shopify, Shopify Templates, Web Development, Website Design)