Pros: The company is very relevant, and what we do matters. This means there are opportunities for you to make a real impact on society. Virtually infinite learning opportunities. There is always some new technology to learn. You will never be bored. Compensation is excellent. There are few places that would pay an engineer more. Perks are amazing. And I haven't even tried the free food yet. (We're still working from home.) Fast-paced. Engineers have extremely high autonomy. Engineers usually decide for themselves what projects to work on. Employees are very optimistic and regard most problems to be solvable. We are always trying to innovate and improve. The middle managers are some of the best I've ever seen at any company. They respect people and seem to really care about their well-being and career goals.

Cons: Expectations are very high. You have to be strategic about how you spend your time because there are so many expectations that it's hard to satisfy them all if you just do random work without thinking about how it matches the expectations list. This is kind of an annoying cognitive burden to constantly deal with because no one will directly tell you what to do. (See the point about autonomy, above.) * If you like to be methodical or process-oriented, it can be frustrating at times because Facebook is the opposite of that. Most activities are ad-hoc and documentation is usually terrible or non-existent. Tools and infrastructure randomly break and you frequently have to troubleshoot them yourself. * Software reliability is not the best, which means you will frequently be pulled into putting out some fire or preventing a crisis, rather than working on the thing you would prefer to work on.

Pros: Freedom to work on many things.

Cons: The workload/stress ratio could be better.

Pros: Brightest people from the whole world. Freedom in everything: no micromanagement, no presence control, no forced decisions. Great free food. No worries about env and HW: many things are automated, for the rest we have dedicated teams. Trips and trainings.

Cons: Lots of internal, specific tools. You have to study to get in, and the knowledge is hardly reusable when you leave. Any major initiative takes a very long time since you need to convince every single person around you to help (join) the project. Weird yearly assessment with requirements to provide impact in multiple pillars: project, people, direction, improvements. Might be tough to be good at all of them.