Create a great e-commerce site on Superstore theme

We are an existing business with an e-commerce store selling food & groceries, but we need to take it to the next level so have purchased superstore theme by pixel union, which we believe to be a great theme with more functionality.

I have a strong idea of how I would like it to look, and want somebody to build it with me. I can do all the categories, and data input, but need an expert in the design & maintenance.

This project has to be started immediately, hopefully to complete in 2-3 weeks, with ongoing work after that.