Pros: Uber is growing really, really, really fast. Seriously, you'll see the hockey stick growth everywhere: number of riders/drivers, number of new employees, number of [our] money we make, etc. This is also a really fun and cool place for Software Engineers. Compared to big companies, Uber is still very small. Each team is extremely small. There are so many problems we want to solve. My peers are extremely talented, no matter how many years of experience you have. Uber engineers focus on our mission and execute it in a very efficient manner. Compared to other startups, Uber is still moving extremely fast. Once you join, you'll see what kind of challenges we have. This is not just a feature. You'll have an impact! Also, you have a very friendly culture. At the end of the day, I am solving a very interesting problem for millions of riders, drivers, or even merchants. Everyone helps each other and learns from each other. By the way, saying is easier than doing. I've seen it in other companies. We also have very interesting tech talks. Again, you'll feel the scale of the impact you can make as an Uber engineer.

Cons: Lunch catering could be better.

Pros: Uber is jam-packed with amazing talent. There are so many hard engineering problems, product problems, and finance problems. It's easy to learn a ton, and it's awesome to be a part of such an interesting company. I can say that I've met many fun, incredible people there, and I do believe Uber is making a tangible change in the world.

Cons: The company as it stands today is a pre-IPO slaughterhouse. Depending on what team you're on, or the luck of the draw, you will be guilted into working crazy hours. After all, everyone else does it, so why shouldn't you? You will be on-call 24 hours a day. You will be judged heavily by your "commitment to the company." Your personal life is absolutely meaningless. Uber will need to be at the forefront of your mind at all hours of the day, and even in your dreams. TL;DR: There is no work-life balance. You will burn out.

Pros: Good peers are there, so it's a good learning environment.

Cons: Too broad a system makes it hard to adjust at the beginning.