Ruby on Rails Developer - Automated Amazon orders.

Hi,

I'm looking for a skilled RoR developer , familiar with Amazon API.
The job is to create a sample RoR application that will receive either:

1) Amazon credentials (user/password).
or
2) Amazon token / access privileges given by a user (preferred option).

Given one of the above , the application will be able to fully complete an order in Amazon.
(obviously that a product ASIN , shipping address etc. are part of the inputs to complete the order)

In order to submit your work , you'll need to create a GitHub/BitBucket/similar account and upload your code to it and send me the details.
After inspection and testing to see that it actually works I'll pay the full sum.
Anything partial isn't interesting , if you don't know how to do the job from beginning to end , don't bother applying.

Thank you.