At least 3 rounds (I failed the 3rd one): introduction, 48-hour coding challenge and a technical interview. The latter was very unpleasant: 2 Dutch young guys with no enthusiasm at all. The questions asked were all about the exchange design, so without prior experience with exchange design success is unfortunate. Honestly I was expecting that questions asked would be something about algorithms. Feedback was expectedly negative

3 Rounds - Initial Phone Screen, 48-hour Take-Home Coding Challenge, and Coding Challenge Solution / Exchange Architecture Interview. The technical coding screen was overall well designed but there was a bug in one of the hidden unit tests that prevented my (correct) solution from being accepted by the system. This led to a lot of stress on my end since I couldn't see the test that was failing and my solution was correct. The follow-up interview was disappointing. Interviewers showed up 20 minutes late and were very impolite. I think they simply forgot to let me into the meeting, but they were too embarrassed to admit that. So they accused *me* of being late. After that I had to defend my solution to the coding test (very easy). But then they asked me to design a stock exchange. They kept interrupting and pointing out flaws when I hadn't had any time to even think or ask clarifying questions about the problem. It's as if they had already decided they wanted to fail me and weren't interested in seeing what I knew about design. Overall extremely negative experience. I would strongly recommend candidates not waste 48-hours of their lives doing the take home coding test like I did. Just apply somewhere else where the people will be more respectful and enthusiastic.