I am US-based, working out of my home office in Houston, so you gain all of the benefits of communication, time zone, and availability that come with that.
I do the work myself. There are many bidders on Freelancer.com that are actually project managers, farming out the work, so you have no access to communicate or control the quality of the work being performed. When you hire me, you are not hiring a middle-man.
I have deployed ecommerce stores to Shopify, and I am the author of a shipping add-on in the Shopify Add-ons, so I am very familiar with their API, as well as custom theming. This will be principally accomplished using Shopify's theming language + Javascript.
I'm available to being working on this project pretty much right away.
If you decide for us to work together, you’ll have access to me through Freelancer messaging, as well as phone or Skype, whichever is most convenient for you.