Applied on iOS developer position. First step is 15-min phone (Skype) screening with Technical Recruiter. We went through my experience and motivation about working at Yelp. After that she asked about 10 technical questions - algorithms complexity, data structures, nothing much advanced - the same things from others' reviews. I also had opportunity to ask about Yelp and whole recruitment process. In the end of interview she said, that I passed to the next step and we arranged a time for technical 45-min interview. Technical interview was 2 days after phone screen. It was Skype video call with Yelp iOS engineer. We've used coderpad.io for online coding exercise, it was anagram-related task. Language of your choice (but they like Python). After my first solution, interviewer asked about its complexity and how we can improve it. There also were a number of simple iOS-related questions. And again it is the time to ask questions about their workflow. Interviewer writes your questions down, so be sure to have some interesting questions to ask :) Received rejection email in one week.