Comprehensive Shopify Website Troubleshooting & Repair

I'm seeking a proficient web developer with extensive Shopify experience to rectify my website's widespread issues. The errors have been pinpointed by automated testing tools and encompass design flaws, functional bugs, and loading speed problems across key areas like product pages, the checkout process, and the homepage.

Ideal skills and experience for the job:
- Extensive experience with Shopify platform
- Proficient in web design and debugging
- Capable of enhancing website loading speed
- Familiar with using automated testing tools
- Able to understand and implement design improvements
- Excellent problem-solving skills