Stripe. We're hiring engineers in San Francisco and remotely within US timezones. INTERN, REMOTE, H1B all welcome.
See [1] for an overview of what challenges we're working on, or check out [2] for a description of our interview process. You can apply by emailing me directly at REDACTED_EMAIL. Make sure to include some background on who you are as a programmer — at the very least, what motivates you, what kinds of things you like to build, and (if available) a code sample that's representative of your best work.
Also feel free to ping me if you're thinking about applying but have any questions or hesitations.
[1] <a href="http://www.quora.com/Stripe-company/What-engineering-problems-and-challenges-is-Stripe-solving" >
[2] <a href="http://www.quora.com/Stripe-company/What-is-the-engineering-interview-process-like-at-Stripe" >
Ask HN: Who is hiring? (March 2014)