Pros: Unbeatable culture, especially in infra.

Cons: There's no hiding the fact that it has become a monstrous megacorp.

Pros: Compensation, benefits, and perks are incredible. Company culture is so, so good. I've had two great managers who both have done an excellent job supporting my growth and guiding my career. It also feels like senior and C-level management really cares about employees. It feels like Facebook, the company, really tries to support me as a whole person (but be sure to ask for what you need; nobody's a mind reader). For engineering, bootcamp and team selection are such a good idea. I freaking love my team, and I get to own my decision to join that team (rather than some hiring/allocation manager deciding where I get to go). Very few operational rules/bureaucracy. I can SSH into any machine I need to. If someone's fighting a fire anywhere in the company and I am able to help, I feel like I can always jump in to help. I really like Infra, so being at a big company like FB is super fun.

Cons: On-call shifts can kill your sleep if things are noisy overnight. There's a little bit of an "always on-the-grid" culture, which contributes towards the 4/5 work/life balance, but it's generally not too hard to fight it. Most people who work a lot end up doing it because they're passionate about their work, anyway.

Pros: Salary is good. Benefits and free food.

Cons: Pressure is a lot more.