Shopify Developer

I’m looking for a Shopify developer to help with the following issues in my store:

1. “Quick Add” / “Add to Cart” button

Current problem: When a customer clicks “Quick Add” or “Add to Cart” on any product page, the item isn’t added to their cart.

2. Search-bar resizing

Current problem: When the browser window is resized, the search bar overlaps other header elements.

3. Theme updates & custom code

Current problem: Updating the theme removes all custom code changes and adjustments. We need to update the theme without losing any of our customizations.