Phone Interview (HR screening) around 20 min. Very straightforward and questions can be found on glassdoor.
45-min Skype interview with a software engineer. Asked about past projects. One coding exercise (writing a function to find a hidden guess integer given a helper function). Asked a product design question.
45-min Skype interview with another software engineer. Asked about past projects. One coding exercise (find k-lowest elements). I did not make it past this round.
In all interviews, the interviewer was very kind and responsive. The phone screener was not a technical recruiter and could not necessarily answer any questions in detail. The software engineers were very helpful and I could see that they enjoyed talking to me. Great experience and even though I was rejected I had a positive feeling about the whole process and will definitely try again in the future.