Palantir FDSE Interview Guide - What to Expect and How to Prepare

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Palantir Forward Deployed Software Engineer Interview

Palantir pioneered the FDE role and their interview process is uniquely structured. Here is what to expect.

Interview Stages

1. Online Assessment / Phone Screen

   • Coding problem, typically algorithmic but with a practical twist
   • 45-60 minutes
   • Focus on clean code and clear communication

2. Technical Phone Interview

   • System design or coding problem
   • Interviewer is usually a current FDSE
   • They care about how you think through trade-offs, not just the solution

3. On-site / Virtual Super Day (3-5 rounds)

   • Coding x2 - Data structures, algorithms, but applied to real scenarios
   • System Design - Design a system for a specific client use case
   • Decomposition - Break down a complex, ambiguous problem into manageable pieces. This is unique to Palantir
   • Behavioral - Leadership, teamwork, client interaction scenarios

The Decomposition Round

This is what makes Palantir interviews different. You are given a vague, real-world problem and must:

• Ask clarifying questions to scope the problem
• Break it into sub-problems
• Prioritize what to solve first
• Propose a technical approach
• Discuss trade-offs

Example: "A city wants to reduce 911 response times. How would you approach this?"

Tips from People Who Passed

• Practice explaining your thought process out loud constantly
• Study graph algorithms - they come up frequently
• Read about Palantir products (Gotham, Foundry, AIP) to understand context
• Prepare concrete examples of working with non-technical stakeholders
• The decomposition round is about structured thinking, not code
• Show genuine curiosity about hard problems

Common Mistakes

• Jumping to code without understanding the problem
• Not asking enough clarifying questions
• Treating it like a pure SWE interview - they want FDE mindset
• Ignoring the human/client element in system design

Have you interviewed at Palantir? Share your experience and tips below.