Build Magento Export Product Tool for 2 Marketplaces

I sell products on 2 US marketplaces in addition to our website. The marketplaces are similar to the Amazon Marketplace. It is called [login to view URL] and [login to view URL] . Both sites have data import tools with specific data categories and specifications. I need to find a freelancer that maybe familiar with creating data files to create a data export tool for Magento for each of these marketplaces. They will need to study the data file fields and categories to best create an export that will successfully add our products into these marketplace shops. It is important that this person is detailed and familiar with american apparel and accessory terms. It will be a plus if applicant is familiar with the 2 marketplaces i mentioned. There are about 400 products with multiple child products. i will present you with the login credentials and you will download templates, create sample uploads to test the data imports, then create a tool in Magento to auto create the files. (correct category mapping may be a little tricky) The result of this project is that i will have a tool in Magento where i can use to easily upload new products on a weekly basis to these marketplaces.