Build us a custom Shopify dashboard (Shopify API/PHP)

We are a company that manages a ton of different Shopify stores for different content creators. We would like to create a web dashboard where we can allow our content creators to log in and view their store's analytics (pulled from the Shopify API), and where our company's staff can view overall analytics across all stores (or select a specific store to view key analytics for, like amount of orders, avg. order value, and items sold). We would also love to have an area that shows us for a specific store how much was sold for each product, broken down into size and color, within a certain date range (and should be exportable to csv). We should be able to add more stores as required on our own, without too much configuration work if possible. We already own an Admin Dashboard template (Cuba, from ThemeForest) that we plan on using, so a large portion of HTML/CSS is already done, but there will obviously be some additional work that is needed. This is a basic outline, some requirements may change as the progress progresses. But you will remain in contact with our team the whole time to discuss ideas, features, specifics, etc. This may be an ongoing project where we may hire you again in the future to perform updates & add additional features. PLEASE NOTE: The selected Freelancer will be asked to sign an additional, more comprehensive NDA/IP agreement via our company's secure signing portal before the project begins.