Applied online, got a phone interview. The interview was pretty straightforward. They asked a lot of "how you think" questions. So, things like, "How do you calculate the rate of change of money on the ground in a city?" ... "How do you design a washing machine and dryer for a bachelor?" "How could you use twitter to create more accurate search results." Also, you should be able to explain your past experiences and make it sound good as if you are presenting a new product to a customer. I did not get the on-site interview though. I think the main thing is don't second guess yourself and state even the obvious things about a given problem.