Fun, fast-paced environment filled with lots of opportunity
Pros
This is one of the very few companies nowadays where you can see an immediate impact of your contributions. Everyone and everything moves very quickly and things actually get done. The company is growing every week and it's exciting to be part of that. It's no wonder the survey results show that people are proud to work here - everyone seem happy to be at work. The hours are very flexible, with the motto of "get your job done" - it isn't about face-time as much as it is about getting things done quickly and efficiently. Everyone is really smart and is working towards a common goal. Collaboration is a huge part of the organization, so if you prefer to work alone all the time, this may not be the place for you. Additionally, you can easily grow and have lots of opportunity to grow, learn, and move within the company. Perks - chair massages, manicures, snacks all the time, lunches many times, bagel fridays, lots of various events in every office, regardless if you're in Chicago, California, Cambridge, NY, or in other parts of the world. The company tries to do the same thing in every location so no one feels like they're not part of the org. They're also very family-friendly/family-oriented and have a wall of "MathBabies" which is really cute. There are bring-your-child to work days, with even little kids showing up.
Cons
Since the company has grown so quickly, there are some process that need to be put in place that may not have been necessary before, but that's being done. If you're not prepared to work hard, and just want a 9-5 job, this place isn't for you.