Shopify Speed and Core Web Vitals Specialist - Manual Code Optimization

I need an expert Shopify Developer to optimize elganza.com. My store currently scores 45 on Mobile and 42 on Desktop. I am looking for a professional who performs manual code optimization without using third party apps to improve Largest Contentful Paint (LCP) and Total Blocking Time (TBT).

Target Performance Goals (KPIs) I expect the following results after optimization:

Mobile Score: 80 to 85+ on Google PageSpeed Insights.

Desktop Score: 90 to 95+ on Google PageSpeed Insights.

LCP (Largest Contentful Paint): Under 2.5 seconds.

CLS (Cumulative Layout Shift): Under 0.1.

TBT (Total Blocking Time): Under 200ms.

Specific Technical Tasks

CSS Consolidation: Combine 20+ small CSS files including price, ticker, and tooltip components into base.css to fix Render Blocking Requests.

LCP Image Fix: Implement fetchpriority high, preload, and proper srcset for hero banners. Convert PNG images to compressed WebP format.

Font Optimization: Move Inter fonts from Heroku and third-party servers directly to the Shopify Assets folder to eliminate the current loading delay.

JS Audit: Defer Swiper.js, Google Tag Manager, and Facebook Pixel. Remove unused code from uninstalled apps like Pusher or COD King.

DOM Reduction: Simplify the theme liquid structure to reduce the current DOM size of 9,000+ elements.

Technical Requirements

Manual Work Only: No speed apps like Booster or PageSpeed Guru allowed.

Safe Development: All work must be performed on a Duplicate Theme.

Visual Integrity: No Flash of Unstyled Content (FOUC) or broken layouts permitted after optimization.

Submission Requirements Please start your proposal with the word OPTIMIZE.

Share a before and after report of a previous Shopify speed project.

Confirm you can meet the target score of Mobile 80+ and Desktop 90+.

Explain the specific strategy you will use to fix the 3.5 second resource load delay shown in the current LCP report.