Pluspunten
You will work on interesting projects and have a big impact on the final products. Most of the people in the organization are very passionate about the work. If you came from Microsoft, you will probably do very well here and the idiosyncrasies will be familiar, but not as pronounced. Compensation is okay for a non-profit. Company will do well because its product is free and it's funded by big tech, so job security is great. Flexible hours.
Minpunten
As a young organization, they hired people who didn't know what they were doing. You'll note that there are a lot of "growth" opportunities in that many people are not qualified for the work that they are asked to to, to the point that management is not aware what qualifications are necessary for some jobs. Recently, the organization lost most of their experienced education staff, who had become disillusioned with management and the tech-centric culture. If you have experience in education or a non-profit, you will probably be happier somewhere else, where equity is valued more highly and the management is aware of what goes into quality educational projects. This organization has the same problems that a lot of tech companies have with valuing and recognizing the contributions of women and people of color.