Stripe. We're hiring engineers in San Francisco and remotely within US timezones. INTERN, REMOTE, H1B all welcome.
See <a href="http://www.quora.com/Stripe-company/What-engineering-problems-and-challenges-is-Stripe-solving" > for an overview of what challenges we're working on.
If you're interested, you can apply through the email links on <a href="https://stripe.com/jobs" >. If you have any questions, feel free to ping me directly at REDACTED_EMAIL.