Custom WordPress Ecommerce Site Development

I need a skilled WordPress developer to create a custom-designed ecommerce site for selling physical products.

Key requirements:
- Must include a shopping cart
- Product and product category Pages
- Multiple payment options
- Ability to handle product variations
Looking for (if possible) advanced product variations such as this page where the fabric band can be changed and the fabric type also changes on a pop out menu/ some thing similar.
https://www.officereality.co.uk/prod/sand-panel-based-acoustic-booth

Ideal Skills and Experience:
- Proficiency in WordPress and ecommerce site development
- Strong design skills for custom WordPress themes, happy to have a already built theme but needs to be some thing im looking for and i have yet to see any prebuilt ones that are.
- Experience with setting up shopping carts and payment gateways
- Knowledge of product variation implementation in ecommerce platforms

Some websites in the same sector and inspiration for the site are:
www.officereality.co.uk
www.officeboffins.co.uk

Please provide examples of previous work if possible. Look forward to hear from you.