Google

Perks and benefits galore.

Google has incredible health plans, retirement plans, and paternity leave.

Coworkers are extremely bright.

Lots of fun facilities.

I prefer the flat corporate structure.

Google has an enormous codebase. Lots of jobs are just doing maintenance to keep your service up with the many internal monolithic tools that are constantly being deprecated.

Solutions tend to be overwrought in order to "demonstrate complexity" for promotion committees.

So much competition when you are basically a cog can be discouraging. Many coworkers work in evenings and weekends. There is no 20% time. It is really difficult to get promoted when there are very few open slots.

More emphasis on YAGNI principles and less on complexity.