Website PayPal Integration

I am in need of a freelancer who can integrate a Buy Now Button PayPal feature into my custom-built website. The ideal candidate should have experience with custom-built platforms and PayPal integration.

Requirements:
- Integration of the Buy Now Button PayPal feature
- Experience with custom-built platforms
- Ability to implement shipping and tax calculation features

Skills and Experience:
- Strong knowledge of PayPal integration
- Proficiency in custom-built platforms
- Familiarity with shipping and tax calculation features

Please provide examples of previous work related to PayPal integration and custom-built platforms.