Architect and Java webservice developer for marketplace API developemt

We are starting up a project for marketplace inventory sync system for different [login to view URL] a webbased system to retrieve all the product inventory information from Amazon, sears, [login to view URL], and ebay and update the new inventory in all the [login to view URL] will be starting with 2 marketplaces initially and add more later. This is marketplace inventory system using java webservices, mql, jquery, and AJAX. we will synchronize the inventory data for marketplaces such as [login to view URL], [login to view URL], [login to view URL], and ebay.com. Looking for someone who has experience in working with one these marketplace APIs retrieving order information , and processing, and updating the inventory. We are looking for an architect and a developer to design and work on this system, we prefer who can do both. PLEASE BID ONLY IF YOU HAVE WORKED on one of above marketplace APIs of retrieving and processing the orders, and updating the data, etc.