One phone interview, followed by an onsite interview.
One of the algorithm questions I received was genuinely difficult (probably the hardest question I've been asked in any software engineering interview, in fact), but I don't remember the details quite well enough to replicate it here.
Aside from that, the questions I was asked were all reasonable. However, I was a bit surprised when one of the interviewers spent several minutes speaking generally about my personal tastes/opinions regarding object-oriented design, asking questions like, "What is your favorite design pattern?"
Frankly, I really don't have a "favorite design pattern," and I felt a bit awkward answering these questions, which were posed with much enthusiasm.
The following metrics were computed from 47 interview experiences for the Palantir Software Engineer role in Palo Alto, California.
Palantir's interview process for their Software Engineer roles in Palo Alto, California is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Palantir's Software Engineer interview process in Palo Alto, California.