Opzi.  YC enterprise software startup, hiring software engineers (full time and intern) in SF.  If you're from Vancouver, BC, drop us a line as well.
What We Do:
At Opzi, we're building real-time business collaboration software.  Our first product aims to change the way people share knowledge within a team or company.
Founders &#38; Funding:
Euwyn (from Vancouver) was Cornell CS '04, JD from Cornell Law '07.  Ambert was Stanford EE '06.  Funded by Y Combinator, Ron Conway, First Round Capital, Paul Buchheit (creator of Gmail) and many others.
Tech Stack:
Rails, Node, Backbone (lots of JS).
Who We're Looking For:
We're mostly impressed by what you've made rather than the grades you earned in school.  You should have a strong demonstrated interest in modern web development (i.e. have some projects and/or a Github account to show) as well as an ability to learn quickly and work independently.  Ruby and Javascript experience would be great, but no sweat if you're more comfortable in C++ or Python.
How to Apply:
Complete 1 or 2 of the programming challenges at the URL below, and send to REDACTED_EMAIL, along with a quick email with a little bit about why you're interested.
<a href="http://opzi.posterous.com/" >http://opzi.posterous.com/</a>
Ask HN: Who is Hiring? (May 2011)