Facebook hires very very young and extremely bright young people from all over the world. They then provide you with what I felt was an MBA level training in how to work the right way. This included: dealing with conflict (fast feedback), meeting cadences, star charts to evaluate work and get buy-in from peers on priorities, gobs and gobs of information and documents to do your job. BUT, and it's a big but, it is all self-directed. In other words, you must be able to thrive in ambiguity and be motivated to seek out the info you need. It won't be handed to you.