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

All Roles Cloud Engineer 3 Data Engineer 7 DevOps Engineer 3 Frontend Engineer 10 Full Stack Engineer 10 Machine Learning Engineer 10 Product Manager 3

All Topics Algorithms 7 System Design 7 Culture Fit 4 Big Data Architecture 3 SQL 3 Data Modeling 2 Data Architecture 2 Leadership 2

Data Engineer • Coding • medium

Given a list of flight schedules represented as intervals (start_time, end_time), write a function to merge all overlapping flights to determine the total continuous time the airspace is occupied.

#Arrays #Sorting #Intervals

Practice

Data Engineer • Coding • medium

Palantir's Foundry maps data into an Ontology. Given a directed graph representing data lineage where nodes are datasets and edges are transformations, write a function to detect if there is a circular dependency.

#Graphs #DFS #Cycle Detection

Practice

Data Engineer • Coding • medium

Given a massive log file of user activities, write a program to find the top K most frequent IP addresses. The file is too large to fit into memory.

#Streaming Algorithms #Heaps #MapReduce

Practice

Data Engineer • Coding • hard

Given a string containing a JSON object that might be malformed (missing closing brackets), write a parser that attempts to extract all valid key-value pairs where the key is 'entity_id'.

#String Manipulation #Parsing #Regular Expressions

Practice

Data Engineer • Coding • medium

Given a 2D grid representing a map where '1' is land and '0' is water, write a function to find the number of distinct islands. An island is surrounded by water and formed by connecting adjacent lands horizontally or vertically.

#Graphs #DFS #BFS #Matrix

Practice

Data Engineer • Coding • hard

Write a Python function to deserialize a binary tree from a string representation and then serialize it back to a string.

#Trees #Serialization #DFS #BFS

Practice

Data Engineer • Coding • hard

Write a query or script to calculate the median response time from a massive log of API requests. Note that the dataset is too large to sort in memory.

#Statistics #Distributed Computing #Approximation Algorithms

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.

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Unwritten Rules

Think Out Loud

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

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