Ruby paypal experts: help us integrate with paypal subscriptions. You do paypal-specific code only, we write the application logic.

We are building an online subscription service and are looking for a **paypal expert with Ruby skills** to help us integrate it with paypal. We're open to doing this on a fixed-price or per-hour basis, whichever you prefer. We are writing the application logic ourselves. We need you to **add the paypal-specific code only and help us integrate it. Please read the attachment document for the detailed set of use-cases we need you to implement. ** In your bid, please specify: 1) Your level of experience with Ruby 2) Your level of experience with the paypal IPN messages and website payments pro. 3) Whether you'd like to do this on a fixed-price or per-hour basis. Given that we want high-quality code, we'd prefer per-hour. We suggest this: Bid a fixed-price amount for 5-10 hours, and let us know your hourly rate. We can pay extra time you spend as RAC bonuses then. 4) confirm you've read the attached document Thank you for your time, we look forward to seeing your bid.