Pros: Nice and passionate people. Lots of work for engineers. Many opportunities. Many supports for employees. Many of the employees are smart.

Cons: Normally busy. Inexperienced engineers sometimes lead the project, which causes a mess. People move too fast and break things, which is not good from an engineering perspective.

Pros: Good perks and good work.

Cons: Pressure to create impact across verticals.

Pros: Facebook decided somewhere along the line that speed and engineer efficiency mattered more than predictability and avoiding mistakes. The result is a rather refreshing environment where engineers are expected to take risks and use our discretion to jump on what we see as most important. My co-workers are amazing – Facebook's been able to hire some of the best talent in the valley, and it shows. The perks are top-tier. It's just gratifying to work for a company with a sense of mission about creating good in the world, and that's at Facebook's heart. It's certainly helpful to love using the product yourself, but as long as you derive satisfaction from the billion people who do, you'll be happy working here.

Cons: Suspecting Facebook of nefarious motives is a popular, if misguided, Silicon Valley pastime. Usually, trying to argue people out of it is a waste of your time. :/