Let me start by saying welcome to San Francisco!
We've got lots of opportunities for smart guys like you and we love C++ here at Room77.
We may not have the "big data" opportunities like Twitter has but we have a big dream, to build the best hotel shopping site in the world and we've got amazing VCs and people backing us and we have a lot of interesting problems to solve.
Your quant and derivatives background is especially interesting since we have a new project that's basically custom made for someone who wants to build a highly algo-driven engine.
Send me an email roger[at]room77.com if you're interested in finding out more or just shoot us your resume here and complete a few of our problems https://www.room77.com/jobs/se_resume_form.html?p=SWE&s=...