メインコンテンツまでスキップ

Palantir Front End Interview Questions

Latest version on GreatFrontEnd

Find the latest version of this page on GreatFrontEnd's Palantir Front End Interview Guide.

JavaScript coding questions​

  • "Quick fox" DSA question — a widely-shared Palantir phone-screen problem. Worth looking up ahead of time.
  • Intervals problem: design a class with related methods (insert, overlap, merge) over a list of intervals.
  • Given a text and a query of two words plus an integer k, return the indices in the text where the distance between the two words is ≤ k.
  • Tree / graph traversal problem (recent phone-screen variant).
  • Validate a graph — confirm it satisfies certain properties, plus follow-up on time and space complexity.

User interface coding questions​

  • Debug and extend a React app (90-minute onsite round). JS or TS allowed. The JS functionality is quick — most of the time is spent on styling and formatting.

System design questions​

  • Decomposition (Decomp) round: unlike typical FE system design, there's no whiteboarding and no deep technical dive. You explain and organize concepts in a plain text editor. Practice doing this without a diagramming tool. Highly interviewer-dependent — they're looking to see if you can think "like a Palantirian" and sync to their vocabulary.

Insider tips from the GreatFrontEnd community​

These tips were shared by GreatFrontEnd users who have completed interviews with Palantir.

March 2026:

Just had a phone interview with Palantir for a frontend role. It was the "quick fox" DSA question that's been widely shared online — worth knowing about going in.

July 2025:

Palantir phone screen + onsite experience (frontend role):

  • Phone screen: typical DSA/LeetCode style around intervals — design a class with some related functions. No specific JS/frontend knowledge needed.
  • Onsite was 2 rounds: 60-min "Decomp" and 90-min debug/extend React app (JS or TS). The coding portion was easier than other places I've done, but more freeform — the JS functionality was quick to implement so I had to spend more time on styling/formatting. The Decomp round is different from typical FE system design — no whiteboarding, you don't go deep into technical concepts, and it felt very interviewer-dependent. They're explicitly looking to see if you think "like a Palantirian" — sync up to your interviewer's framing/vocabulary. I'd practice doing system design in just a text editor without a diagramming tool ahead of time.
  • Behavioral / cultural fit is really stressed. All my interviewers mentioned being attracted to Palantir because of "the mission" — you have to sell that you align with what they believe and the work they do. Have canned answers / stories ready.

March 2025:

I have one tomorrow with them for a full-stack role leaning frontend. Here's what the recruiter told me to expect for the interview process: - Technical Interview — Leetcode, DSA

  • 2 Interviews
    • Web Dev
    • Decomposition Interview (System Design)
  • Hiring Manager Interview

August 2024:

I had a tree / graph traversal type problem for Palantir phone screen. More leetcode-y and less FE-specific. Uber was building a small app in the UI. React GreatFrontEnd problems were super helpful with clearing that round

For more insider tips, visit GreatFrontEnd!

Table of Contents