Build a PriceYak alternative which connects to Shopify

We are looking for something similar to PriceYak, which will connect to Amazon (UK, US) and Shopify. As Admin Users of the application, we should be able to: 1. Enter a list of ASINs on the application, which will then import in product details for these ASINs into the application. We should be able to manage these products in different folders/categories. 2. We should be able to manually edit the products to change collections/tags/description/images etc before these products are imported to Shopify.  3. Manage any number of Shopify stores connected to the application. 4. Match a folder/category of products imported in Point 1 to a number of selected Shopify stores. 5. When we come to update or add products in the application to a specific folder/category, any store connected to that product folder/category should be updated automatically. Application Users/Shopify Stores will: 1. Connect their Shopify store to the application. 2. Have no access to add/remove/view products within the application. 3. Be able to connect the application to their existing Amazon customer account, used to automatically fulfil orders placed on Shopify (See point 6). 4. Be able set pricing for products by a formula or fixed amount, for various price tiers 5. Items should reprice in Shopify according to cost changes on Amazon and changes to the formula settings. 6. Inventory levels for each item in the Shopify store updated according to the Amazon listing. 7. The application needs to take orders placed on the Shopify store and store them in the application. Then create the order on Amazon shipping to the customers address. The order is placed from the app users IP address. 8. Be able to query the order to see detailed profit values and order information. 9. Update the Shopify order status and any tracking information from Amazon. Further details will be provided