I was approached by a recruiter in the company. He helped me well during the whole process by explaining each step and how I could best prepare for them. The first step was a phone interview which treated my background and interests. I wasn't aware that there would be some deeper motivational questions but it was not a problem nonetheless. The next step was an online coding exercise on HackerRank called "Catching an Insider Trader". I thought it wasn't too difficult and only required knowledge of some basic data structures. A tip I give is that you need to read the description very carefully. After that I had a video meeting with a member from the engineering team. This session included talking about my experiences and passions within software engineering. Also I received a coding challenge of having to implement a hash table without libraries in a chosen language. For this exercise it is definitely helpful if you brush up hash tables before. Finally I was invited to an on-site interview. The travel and stay was all taken care of very professionally with accommodation in an upscale hotel close to the office. On the day itself I think I had 4 interviews with different members of the company. It included a classic algorithmic problem solving exercise, a debugging exercise, a architecture design exercise and also a more general talk. In each session there were also some questions about my experience and why I want to work at Palantir, plus extra time to ask questions of my own. The level of the challenges was good I think and I actually enjoyed them. Also the people I met with gave a very positive impression of the company. In the end I didn't get an offer because "we do not have a position that is a strong match for your qualifications at this time", without a more specific reason because "the company policy is to refrain from providing detail on hiring decisions". This was actually quite a disappointment because it didn't give me anything to work with.