Improve and add to my software

I'm looking for an experienced software developer, to write and improve my software. Must be familiar with eBay, Amazon, dropshipping and also be able to integrate APIs . The software has an admin portal that fetches products from different vendors and lists them on eBay and or Amazon. The products that will be listed on eBay or and Amazon will be monitored for the availability and the price change by the software and more. I also want to add more vendors to fetch products from other than walmart. Software currently fetches products from walmart and lists them on ebay. It also tracks the availability and the price of the products that are listed on ebay. Software currently: --Fetches for products by categories on walmart --I manually push to ebay if I want to list it --Tracks the availability of the item (in or out of stock) and the price change --Import description and title of the item to ebay Problems to Solve: --I would like to get email notification when the item is out of stock and when the price goes up --I would like to fetch products from additional vendors other than walmart --I want the edit section to visually appear like ebays edit section --I want to be able to push and pull items on Amazon --The software currently calculates a selling price, but I want to be able to edit the profit percentage