Inkling was started in December 2005 through Y Combinator and in our humble opinion our service offering, Inkling Markets, is the best prediction market software service available today. And it has been that way for almost 3 years now, because it's easy to use, runs fast, and remains reliable (full Rails test suite and Selenium to top it off).
We're in Chicago, but you don't have to be. Position also has the possibility to become full time if you're looking for some more stability in your life.
To apply:
Write jobs@inklingmarkets.com with Rails Developer as the subject. Please send along a resume, references, and anything you think would help introduce yourself: where you blog, anything open source you've developed, your favorite beverage, etc.
We would love to hear from you. Contact us with questions or comments.