Magento plugin

We need a highly skilled Magento plugin developer with experience with API's and scraping in Amazon and other retailers.

Our software needs to integrate into our Magento system and extract information on a constant basis such as product pricing, stock availability using the Amazon API and screen scraping if necessary.

The amount of products this needs to collect data on will need to be able to handle at least 100,000 products at any one time.
When the information is collected the software/plugin will automatically make changes to: inventory, stock & pricing. As close to 'realtime' as physically possible.

A lot of our products are listed on eBay using the m2epro plugin. Experience with this is absolutely necessary. We would like price matching as well (please see below)

We would also like to incorporate 'run-rates' into our products somehow. 3 day / 7 day / 30 day would be required so we can see products that are not selling or losing sales. We would also like to incorporate a "competitor price" field into Magento so we can see the average price of the top 3/5 eBay sellers for this product.
An expert in this field will be required as 80% of EAN's are not always listed in eBay so you need to come up with a way to AUTOMATICALLY match our product with the correct product on eBay. Keywords / Product images / descriptions / price averages etc..... please see for example: wisepricer

If you do not understand any part of this please do not waste our time and bid on this job. We require this within 10 days maximum and this time is a strict deadline.