Shopify Speed & Core Web Vitals Specialist (Code-Level Optimization) I need a technical performance expert to optimize my Shopify store: While the PageSpeed Insights score shows 100, the actual metrics are failing. The site has a 5.0s First Contentful Paint (FCP) and a "NO_LCP" Error due to script conflicts. I am looking for a developer who can perform manual code optimizations without using third-party "speed apps." Key Objectives & Deliverables 1. Fix LCP & FCP Issues Identify why Largest Contentful Paint (LCP) is failing to trigger (likely due to the marquee/slider script). Ensure the first fold (Hero Image) is prioritized and remove any loading="lazy" or async delay from the primary banner. Implement Priority Hints (fetchpriority="high") on the LCP element. 2. Script Management (Third-Party Optimization) Optimize ShipRocket and Google Tag Manager scripts. Implement "Delay until User Interaction" for non-critical marketing pixels and chat widgets to reduce Main Thread Work (currently at 3.8s). Address the "Forced Reflow" issues caused by marquee3k.min.js. 3. Image & Asset Optimization Fix image sizing issues where 750px images are being served for 334px containers. Implement proper srcset for mobile-specific image delivery. Resolve "Render Blocking" CSS files by inlining critical CSS and deferring the rest. 4. Technical Cleanup Reduce DOM size (currently over 2,100 elements). Remove or consolidate duplicated JavaScript (specifically product-form.js). Requirements Proven experience with Shopify Liquid, Theme 2.0, and JavaScript optimization. Ability to provide "Before & After" PageSpeed Insights or Web Vitals reports. Must be comfortable working via a collaborator account.