E-commerce Website Design

I'm looking for an experienced website designer to create a business website aimed at selling products or services. The website should have the following functionalities:

- Shopping cart
- Payment gateway integration
- Product catalog

Ideal skills and experience:
- Proven track record in designing e-commerce websites
- Strong knowledge of user experience (UX) and user interface (UI) design
- Familiarity with various payment gateways
- Ability to create a comprehensive and organized product catalog

Please provide examples of previous work and a detailed proposal.