Shopify Expert - UX/UI and Developer experience needed

I am looking for a Shopify expert with UX/UI and developer experience to help me with my project. The specific tasks that I need help with are developing custom features for my website. I have examples of the desired features that I can provide for reference. It is important that the features are mobile-friendly.

Ideal skills and experience for this job include:
- Strong knowledge and experience in Shopify development
- Expertise in UX/UI design
- Proficiency in custom feature development
- Familiarity with mobile-friendly design principles