WordPress Performance Developer Needed for Mobile Speed Optimization

We need a technical WordPress developer to improve our website’s mobile speed and Core Web Vitals.
Our site uses WordPress, Avada, and Formidable Forms. Desktop speed seems okay, but mobile speed is slow. We are not looking for general SEO help — we need someone technical who can diagnose and fix performance issues.
Scope:
Audit mobile speed and Core Web Vitals
Check theme, plugins, images, scripts, fonts, caching, CDN, and hosting/TTFB
Identify if Avada, Formidable Forms, or other plugins are slowing the site
Provide a prioritized fix list
Implement approved fixes safely
Show before/after results
Requirements:
Strong WordPress speed optimization experience
Experience with Avada preferred
Core Web Vitals knowledge
Able to work on staging/backups
Able to explain issues clearly in plain English
Please answer:
Have you optimized Avada sites before?
What tools do you use for mobile speed testing?
How would you check if plugins are loading unnecessary scripts?
Can you provide before/after examples?
Please do not apply if your only solution is installing a caching plugin. We need proper diagnosis and implementation.