I applied and I received a HackerRank challenge.
The HackerRank question was consisting of only one question.
I did not get right the question because the timer was running out, and got right all the test cases except one, had I had 5 mins more I would have fixed that.
While I am not into competitive programming (which is what HackerRank tests) I failed because I did not read the question and spent 40 mins doing useless stuff.
My advice is to spend some time READING the question.
Unfortunately Palantir has decided that it is best for them to evaluate only candidates that pass that coding test. In my opinion is not a good filter, since I found out that I could have simply googled the name of the coding challenge (which name was "Catching an insider trader") and would have found a GitHub repo with the code for the challenge, you just tweak it a bit in a way hacker rank does not catch you and you get a phone interview.
Preguntas de entrevista [1]
Pregunta 1
"Catching an insider trader". Pretty easy problem. You can solve the problem with 2 hash-tables and with a banal sorting procedure.
Solicité el puesto a través de la recomendación de un empleado. El proceso duró 4 semanas. Acudí a una entrevista en Palantir Technologies (Londres, Inglaterra) en oct 2025
Entrevista
first Online Assessment, which contains 2 medium-easy leetcode style questions and 1 Rest API design. then phone screen, which is a behavioral kind of questions. then Technical leetcode style questions.
Preguntas de entrevista [1]
Pregunta 1
on phone screen, about the projects and experiences, also why palantir, if I am applying to any other company, If I have a competitive offers.
on Technical, since they might ask you more than 1 question don't take ur time on the first one, the question was designing a round robin kind of system, its using hashmap and lists
Applied to position, first round is 15 min recruiter intro phone call before doing any leetcode questions. Asked about why company, experiences on the resume, basic background info (sponsorship, willingness to relocate). The next rounds should be technical questions and coding.
Envié una solicitud electrónica. El proceso duró 1 semana. Acudí a una entrevista en Palantir Technologies (New York, NY) en oct 2025
Entrevista
First Recruiter Phone Screen - grinded hard on theoretical technical questions. Asked about previous experiences, tradeoffs, decisions, and if you were satisfied or not satisfied from your previous employer. Overall it was good
Preguntas de entrevista [1]
Pregunta 1
What was something that didn't satisfy you in your previous work experience?