Folsom Labs, San Francisco CA, Full-time/Intern Software Engineer
<a href="http://www.folsomlabs.com" >
We're building the next generation in solar (PV) system design tools; basically we make it very easy to analyze the potential value of a new PV systems by leveraging an advanced physics simulation engine. We've been in beta for about a year, and are formally calling it 1.0 in a few weeks.  We've got a lot of great traction, and almost universally stellar feedback from our users. We've also recently received a federal grant[1] to help fund our next generation of products (and a round of hires).
Everyday we get to deal with a range of problems that few startups get to offer – we have a pretty modern web-stack [2] (that we actually need, not just to be trendy), but also get to solve interesting physics/optimization problems on a regular basis, while also acting as industry thought-leaders.  It's a really unique place in both the solar industry, and as a software company.
We've made it this far as a two-man team, and we're poised for a lot of growth in the next year, so it's about time we brought on some help.  If you're a full-stack engineer looking to do some really interesting work (and occasionally put your undergrad physics courses to real use), we'd love to hear from you.
– Paul
REDACTED_EMAIL
[1] <a href="http://www1.eere.energy.gov/solar/sunshot/incubator_projects.html" >
[2] AngularJS (frontend), Python/Flask (API/Backend), Cython/C (Physics Simulation Engine)