Shopify Checkout Button Integration

I'm looking for an expert who can add a dynamic checkout button to my Shopify website. The button should be located on the cart page, the cart drawer, and the product page. It needs to support Apple Pay, Google Pay, and PayPal. I already have accounts set up for all these payment methods.

Ideal Skills:
- Shopify Development
- Payment Gateway Integration
- E-commerce Experience

Please ensure your proposal includes examples of similar projects you've completed.