Hello, I have built several cross platform Web application Based on your requirements, i have strong feeling that i could be the best fit for your cross platform development with for the following facts: shopping cart, eCommerce, website design, html, & css.
Approach to the Job:
I am considering your aspects, but to understand the complete scope i extremely require some specification,
from there we can glean the necessary information. So please share the more details or information if ready?