The interview process has 5 steps, the first usual call, a 1 hour test on hacker rank which is a good first filter with iOS related questions and 3 easy problems. Then the actual test at home where you build a small app. A call with 2 Engineers to discuss the test and discuss about practices, processes or where you can ask questions. A final call with the Director of Software of Engineering. I really enjoyed the process and I always got really quick replies and feedbacks. It took around 1 month.

An online code challenge, a take home project, a phone screen interview. The take home project will ask you to build an Application with certain requirements. It will take you about 16 hours. And they will deadline it in 4 days upon receiving the email. So, you will have to sacrifice your weekday nights or weekends for it. In the video interview, they will ask about the take home project. But the interviewer I met, is a very unpleasant person. He started with: "We don't check people's submitted code before interview. I'm going to look into it right now." I mean, I spend the whole weekend for this, and you don't even bother to prepare your questions for it. As a consequence, he asked question like: why you request BitCoin data every 60 seconds? (Ask for BitCoin data every 60 seconds is a project requirement) So unprofessional.