I was contacted by a consultant and told this position would be for UAE location. Had 2 telephonic interviews - one from Australia and one from London. Both were less technical and more about why palantir? Then I was called for a face-to-face intrerview at Abu Dhabi. 3 interviewers talked to me. It was again more or less technical and also again, why palantir type of questions. I was called in for face-to-face interviews at Palo Alto office. I had 3 interviwers talk to me there. All in all, I had 8 interviews after which they regretted for not able to consider me for a position with them. This whole process took approx 4months. The process is pathetic and time consuming, I had to turn down other offers in the mean time and ultimately ended up with no offer with Palantir too. Interviews had some boring/frequently-asked questions and also some good questions. Sometimes the interviwers get too choosy, they expect a specific answer and if you are not able to get there, you are out.
Also, as many reviews say here, if you are out with a tee-shirt in your hand after the interviews, that strictly means a No. Also, I think the recruitment coordinators need to be trained well - to talk nicely to interview candidates and also to schedule interviews on time. I had to wait for about 45mins. Also, I am not sure what the interviewers are actually looking for. Even if you fare well through out the interviews, you may end up with no offer. So, you never know. The focus is more on your favourite programming language, in my case it happened to be java.