At The Media Crew, F&W Media and Outdoor Sportsman Group I was a UI/UX programmer for several company e-commerce web sites and portals.
I have used the following e-commerce platforms thus far: Coppermine, Magento 1, OpenRealty, Virtuemart, and Zencart.
I have basic exposure to Magento 2 and would invite learning and working on it in the future.
I would also invite working on Shopify web sites if given the opportunity.