Ready Gaming E-commerce WordPress Site Optimization and Redesign -- 2

I'm looking for a skilled WordPress web developer who can optimize, customize, add features and secure my gaming digital store.

Scope of Work:
Full Website Optimization:
My site is running very slow on both mobile and desktop. You must optimize speed and performance across all devices.

Dynamic Pricing Plugin (Custom):
I need a plugin or something else where:

User enters any amount

It multiplies with a set value

Final price updates live on product page

This should be optional and configurable for specific product

Final price should be addable to cart and proceed to checkout

Design & UI Improvements:
Improve overall design using existing themes/templates

Fix broken pages

Good button colors and all Over Site Color

Utilize all customization options available in theme

Make the UI clean, modern, and user-friendly , Nav Bar Change

Make Every Page More Clear Product Page Pricing Need To Be More Clear, Home Page More Content

Email Notification System To User

Product Key Delivery System:

Some products deliver codes only

Add option to manually or automatically deliver codes from WordPress dashboard

User should get the code on their account page + via email notification

Security Hardening:

Improve site security

Prevent spam, abuse, and unauthorized access

Requirements:
Must have experience with gaming e-commerce websites

Understand what design and UX works best for modern gamers

Strong understanding of WordPress, WooCommerce, speed optimization, custom plugin editor, and email integration

Website Link: http://goldenbumps.com
Let Me Know If You Can Improve This Website And Complete All Task, There Is Many Customization Available With My Theme

Bonus:
If your performance on this task is impressive, I’ll consider you for a larger upcoming project.