Experienced E-commerce website builder

Looking for someone who could help build an e-commerce site from scratch. Looking for someone who has a good track record and could really offer us some value. Please share your portfolio of ecommerce sites you have already created for other companies. Open to work with different types platforms.

Also, we do have a couple of website for our B2B business and we could also do with help on ongoing maintenance of them. These are on Joomla so great if you have at least some experience with that from before.