We're a small, non-profit tech startup bringing a free, world-class education to anyone, anywhere.
Millions of people in all walks of life use our free educational platform to learn (check out some testimonials at https://www.khanacademy.org/stories). Most of you reading this are familiar with Sal's videos, but we also have hundreds of videos by other teachers, partnerships with organizations like MoMA and the California Academy of Sciences, and a huge library of interactive exercises.
A few things we're currently working on building right now:
– Major improvements to our mobile offerings to let students practice skills on the go 
– Improved knowledge models so we can better know what you know and don't know 
– Infrastructure improvements to make the site more reliable and faster for our millions of visitors every month 
We're especially looking for mobile and ops engineers, but we have a handful of other positions open. Unfortunately, we've filled up our slots for this coming summer internship, but we'd happily talk to intern candidates for future terms.
Apply at https://www.khanacademy.org/careers - feel free to ask me here if you have questions about applying or about KA in general.
Do you accept remote workers from outside the US? (Canada specifically)