Ecommerce Magento website requiring Amazon Store integritation with inventory manage

We are looking for an experienced individual that has developed and worked on something like this before. Currently have a Magento web store being developed but will require [login to view URL] integration to the site. We want to be able to share our inventory between the Magento web store and the Amazon account. Also need inventory management so that we are able to assign our inventory into our warehouse for easy shipping and locating of the product. we want to be able to ship our products seamlessly without any hassles or headaches and want to control everything from one place and manage all inventory and customers from one place. Having ebay support is a plus! Only apply if you have implemented something like this before. Let us know what experience you have, give us examples of something similar that you have implemented, as well as how your experience will help us with this project.