Shopify Store Troubleshooting

I'm looking for a Shopify expert to help me troubleshoot my store. The problems I'm facing include functional issues like broken links and errors, design issues such as layout and colors, as well as performance issues like loading speed.

Ideal candidates should have:
- Extensive experience with Shopify
- Strong problem-solving skills
- Knowledge of web design principles
- Familiarity with e-commerce site performance optimization