Dear client
I already gone through the all information or description which is detailed by you. You are looking for Website developer
I have much experience of working with Shopify, big commerce, Prestashop.
I have knowledge of HTML, CSS, jQuery, AJAX, PHP etc.
I can customize theme in shopify and can make any design with free theme and
can use all shopify apps.
If you are interested in me, let me know
Warm regards
Thank you