Speed optimization of Shopify website

I am looking for a freelancer to help me optimize the speed of my Shopify website. My main issue is poor mobile performance, and I want the entire website to be improved.
It is significantly slower on a mobile phone then on a computer.
Ideal skills and experience:
- Strong experience in Shopify website speed optimization
- Expertise in mobile optimization techniques
- Familiarity with optimizing large images and files on a website
- Proven track record of improving website load time to meet target goals