Palantir

Palantir

Big data analytics company for defense, intelligence, and enterprise.

5 Rounds ~28 Days Very Hard
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The Interview Loop

Recruiter Screen (30 min)

Standard fit check, behavioral questions, and resume overview.

Technical Loop (3-4 Rounds)

Deep dive into domain knowledge, coding, and system design.

Interview Question Bank

Machine Learning Engineer • Coding • medium

Given a list of flight routes, determine if there is a route from city A to city B with at most K stops.

#Graphs #BFS #Shortest Path
Practice
Machine Learning Engineer • Coding • medium

Given a list of data transformation jobs and their dependencies, write a function to determine if all jobs can be executed, or if there is a circular dependency.

#Graphs #Topological Sort #DFS
Practice
Machine Learning Engineer • Coding • easy

Given a list of intervals representing periods where a server was under high load, merge overlapping intervals to find the total downtime.

#Arrays #Sorting #Intervals
Practice
Machine Learning Engineer • Coding • hard

Write an algorithm to find the lowest common ancestor of two nodes in a Directed Acyclic Graph (DAG), representing data lineage in Palantir Foundry.

#Graphs #DAG #BFS #DFS
Practice
Machine Learning Engineer • Coding • medium

Given an undirected graph representing a network of bank accounts and transactions, find all isolated subgraphs to identify potential fraud rings.

#Graphs #Connected Components #Union Find
Practice
Machine Learning Engineer • Coding • hard

Implement an algorithm to match a set of available ML models to a set of edge devices based on memory constraints and model sizes to maximize deployment.

#Greedy #Bipartite Matching #Sorting
Practice
Machine Learning Engineer • Coding • hard

Given a stream of real-time sensor data, implement a sliding window maximum to keep track of the peak temperature over the last N seconds.

#Sliding Window #Deque #Queues
Practice
Machine Learning Engineer • Coding • medium

Write a function to parse a highly nested JSON log file and extract specific error codes based on a dynamic set of rules.

#Tree Traversal #Recursion #String Parsing
Practice
Machine Learning Engineer • Coding • hard

Given an array of strings representing a sequence of user actions, find the longest repeating contiguous sequence to identify bot behavior.

#Dynamic Programming #Suffix Arrays #Strings
Practice
Machine Learning Engineer • Coding • hard

Write a program to evaluate a boolean expression represented as a string, often used in our ontology access control checks.

#Stacks #Parsing #Strings
Practice

Difficulty Radar

Based on recent AI-sourced data.

Meet Your Interviewers

The "Standard" Interviewer

Senior Engineer

Focuses on core competencies, system constraints, and clear communication.

Simulate

Unwritten Rules

Think Out Loud

Always explain your thought process before writing code or drawing architecture.

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