Pros: They grill you hard in the interview, but once you're in, you get a lot of autonomy and freedom to make decisions about how you think things should be done. Zero bureaucracy or red tape, very few meetings, and people are encouraged to build what they think will work. Two of the common sayings there are "code wins arguments" and "what does the data say?" This means that if people disagree about something, the debate gets resolved by looking at numerical data and/or by building something and seeing whether or not it works. This is a very fast, turn-on-a-dime, high productivity, zero BS environment. It's also a lot of fun to work there. People work hard and play hard.

Cons: The cons at Facebook mostly fall under the heading of "growing pains". Technologically, things move so fast that the layers of the technology stack are often in flux. If you are building a system that depends on other systems at FB, be ready for them to change underneath you. Nothing stays the same for long at Facebook. Every layer of the stack changes, and changes quickly. At the human level, the company has also grown very quickly, which means many of the lower-level managers are new, inexperienced, or got promoted to management for being good with computers (but not necessarily with people). It can be frustrating to report to junior managers and/or people who are clueless about social skills. With that said, the higher-level, more senior managers tend to be really good, and their skill often "trickles down" in various ways.

Pros: Smart people, pretty close to meritocratic. Interesting challenges, high levels of transparency, and super flat hierarchies considering the size of the company.

Cons: Due to emphasis on promoting managers from individual contributors, some managers are not great at people management. Because of limited top-down management, sometimes you end up in tech debt that might've been avoided. Facebook is not really set up for employees with families, although they are getting better. Someone is always smarter than you...

Pros: - A huge amount of learning - Solving problems at incredible scale - Great benefits and pay - Many opportunities to grow

Cons: - Closed technology bubble, with only very few specifics transferable. - Tiny cog in a huge machinery. - Contributing to ethically questionable goals.