Woot was the inaugural partner for Amazon's "Login & Pay With Amazon" service. The goal was to move a majority of Woot customers to a separate login service but allow them to maintain their account username, order history, etc. I started by analyzing the current sign-in/sign-up pages, and did a UX rehaul to streamline the entire experience, not just for Login & Pay With Amazon customers.
I presented my designs with principal designers and design leads at Amazon, and took their feedback into the next stages of the project: usability studies. I worked with the Login & Pay With Amazon designers to build a full prototype of the checkout experience, including authentication, and conducted usability tests over a few days with Amazon and Woot customers.
Finally, I presented findings to the Woot CEO and stakeholders, and delivered final designs and redlines to the Woot development team.
The project was a big success (though numbers are confidential).
Demo of the usability prototype I built in Axure (below):