Good day,
I am developing based on WordPress as a framework for over 10 years.
The example you gave is created using WordPress and an additional theme, I can this for you and fully configure and customize it for you as needed.
I will add some additional features like:
SEO readiness
Submission to major search engines
One month technical support, after which I will not leave you, I will be available whenever needed
Training on managing your website
Of course as an online store you will have the following configured: a cart, a payment gateway, customer registration, online order management and follow up, customer communications & some other necessary features.
Please award to me, I am ready to start working right now.
Best regards,