The process took 1 day. I interviewed at Palantir Technologies in Feb 2011
Interview
Got interview through a recruiter. Interviewer was terrible; he kept stumbling going 'uhh do you mean this' it's obvious they have no managers (they told me) and no real recruiters cause everyone is an engineer.
You are given a pyramid; the numbers for example is 2 on the first level, 3 -1 on the second level, 4 7 8 on the third, etc. How do you calculate the maximum sub sequence of any path traversing the pyramid?
Use dynamic programming. Treat the pyramid as a binary tree. Use a hash table to store the values of each sum in the subtree, with the key being the level + order of the node, and the value being the maximum sum of the paths in its children. runtime and space complexity is O(n) going from the root and doing a depth first traversal through each node.
Interview questions [1]
Question 1
You are given a pyramid; the numbers for example is 2 on the first level, 3 -1 on the second level, 4 7 8 on the third, etc. How do you calculate the maximum sub sequence of any path traversing the pyramid?
I interviewed at Palantir Technologies (Miami, FL) in Jun 2026
Interview
Started with a recruiter screen where the whole point is just checking if you actually care about their mission and the real-world impact of their software, rather than just wanting a cool tech job. After that was a 90 minute hackerrank OA that felt more like an implementation mini-project with SQL and Python instead of abstract algorithms.
The onsite was a 4-round loop chosen from decomp, re-engineering, learning, coding, and sys design. Decomp is the most important one - they give you a super vague prompt like designing a chess game or tracking a disease from scratch, and you have to map out the inputs and logic out loud. Re-engineering gives you around 1000 lines of code with a very subtle logical bug to fix, and the learning round drops you into a random API with barely any documentation to see how fast you pick it up lol. Coding was standard LC mediums but they squeeze a 20-minute behavioral chat right into the middle of it, and sys design was heavy on data governance and fault tolerance. The final chat with the hiring manager is pretty intense too ngl. They will actually make you redo parts of the onsite you struggled with. For prep, don't just mindlessly grind LeetCode. Practice reading other people's code fast and structuring ambiguous problems. I got a really good Palantir coach on Prepfully who helped a lot to catch my blind spots and get a reality check before the actual loop. Overall, not very easy though
Interview questions [1]
Question 1
A payment processing module has a race condition that produces incorrect totals under concurrent writes. Walk through how you would identify the root cause and propose a fix.
I applied through a recruiter. I interviewed at Palantir Technologies (Palo Alto, CA) in Jun 2026
Interview
Standard interview similar to their new grad. Recruiter, two technicals decomp and learning, and then hiring manager half behavioral half technical leetcode style. Really focused on why palantir, mission alignment, and role alignment.
I interviewed at Palantir Technologies (New York, NY)
Interview
Great interview process - 1. Recruiter call 2. Leetcode style technical 3. Scoping style (decomp) interview 4. Frontend coding 5. Another scoping (decomp round).
Interviewers were fun and engaging, and I felt challenged in a positive way.
Interview questions [1]
Question 1
Why do you want to work here?
What are you looking for in your next role.