I can't say what company this is for but I can assure you its one worth joining.
Here's what they are looking for:
NYC start-up looking for a ruby/rails developer who enjoys working up and down the application stack. You'll have a huge impact on the expansion of our platform and the growth of our small engineering team. Your time will be split between iterating on the product, developing new areas of functionality, and applying a maintainability and scaling-aware mindset to our core architecture.
Help us solve interesting problems, from adding location features, to looking for interesting patterns in our data, to assessing and implementing new technologies like MongoDB. We encourage contribution to open source projects and appreciate diverse backgrounds in and out of technology. Experience with payment platforms, faceted search, and building content management tools is nice but not a must.
Interested? Get in touch at [email protected] (pls link to your github profile, if you have one).