WordPress E-Commerce Website Development

I'm seeking an experienced web developer to create a straightforward e-commerce platform on WordPress. The site should feature:

- Seven primary product categories, each with multiple options for modifying product design. The product options will primarily revolve around size variations and types.
- Essential e-commerce functionalities including a seamless shopping cart, user login and registration system, and reliable payment gateway integration.
- A modern design aesthetic, embracing simplicity and usability.
- A clear and logical flowchart detailing the website's operational structure.

Ideal candidates should possess:
- Extensive experience in WordPress and e-commerce website development.
- Strong understanding of modern design principles.
- Proficiency in creating user-friendly, intuitive interfaces.
- Capability of integrating secure, efficient payment gateways.
A friend of mine put together a mock up to get an idea of the feel These images are not the image I will be using. A competitor website is called bodypoint.com they sell very similar products
The product is supports for people in wheelchairs