We are building a world-class team to change how people teach, learn, and use programming.

No openings (but can change our minds if we're impressed)

Who are we?

We are a small team with a passion for making programming learnable, accessible and usable. Our founding team has experience working at Facebook, Codecademy, Yahoo!, and NGOs like The Clinton Foundation and USAID. We are currently based in San Francisco.

We're active in the open source and developer community and encourage all our employees to do so. We worked on and contributed to projects such as Babel, React Native, and many others.

We are not your run-of-the-mill-sleep-under-your-desk Silicon Valley startup. We work hard, but we also spend time with our families, go to the gym, have hobbies, and work on side projects. Turns out, there is enough time in the year for all this.

We welcome all applicants regardless of race, gender, sexual orientation, religion, marital status, pregnancy status, or any other differences.

What do we do?

We build in-browser programming environments (REPLs) for as many programming languages as possible. We make our API accessible so that external developers can build similar experiences. And, most importantly, we build a classroom coding platform that makes it very easy for teachers to bring programming to their classroom.

Our backend is written in Golang and Docker. We provide every user on our site with their own container environment to execute code in. We try to make it fast, reliable, and secure which presents interesting scaling challenges. Our frontend is cutting-edge React, Redux, CSS-in-JS, and Webpack. With the API written in NodeJS and Express. We care about code quality, testing, and our development experience.


These are some of the benefits we offer to our employees. However, it's a work-in-progress and we're open to feedback.

  • Your choice of equipment and software
  • Health benefits for you and your dependents
  • 10 years exercise window for your stock options
  • Flexible working hours
  • Autonomy at work

Email us at [email protected] with a bit about your past work, and what you're currently interested in working on.