Shopify Backend Development Expert Needed

I'm seeking a skilled Shopify backend developer to create a tailored Shopify website featuring:

- Custom backend programming for automated product management
- Auto pick-up shipping integration, specifically for CJ/Aliexpress Drop shipping
- Clean, responsive, and scalable code
- Seamless checkout and user experience

Ideal candidates should have:

- Strong experience with Shopify Liquid, APIs, and backend customization
- Familiarity with shipping API integration, especially auto pick-up features
- Ability to troubleshoot, test, and optimize backend functionality
- Clean coding practices and fast turnaround time

The site must be responsive on all devices. While I’m open to design suggestions, functionality and user experience are paramount.