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Palantir technologies Software Engineer Interview Questions

The questions to prepare for a Palantir technologies Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

50questions
~9htotal time
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1
CodingStart here. 15 questions · ~155 min
Parse Key-Value String MapEasy
Practice
Recently asked

Parse a delimited key-value string into a hash map with overwrite semantics in O(n) time.

Hash TablesData ManipulationfunctionsPalantir technologies
Fix Async Counter RaceMedium
Practice
Recently asked

Debug a multithreaded Python counter by eliminating race conditions and verifying correctness with deterministic tests.

Debuggingasynchronousperformance analysisPalantir technologies
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2
SQL & Data Manipulation6 questions + 2 drills · ~82 min
SQL: Active User QueryMedium
Practice

Find the most active Palantir Foundry user with a date-filtered LEFT JOIN and aggregation.

Data Analysissql queriesPalantir technologies
DP, SQL, and REST-API OAMedium

Assesses breadth across dynamic programming, data querying, and API reasoning.

sqlPalantir technologies
SQL Average Selling PriceMedium
Practice
Practice drill

Calculate weighted average selling prices by product using a date-range join, aggregation, and NULL handling.

leetcodesqlCostarCostar Group
Average Vehicle Idle Time by ZoneHard
Practice
Practice drill

Use joins, a CTE, and aggregations to calculate average vehicle idle minutes in a specific geographic zone.

JoinsData ManipulationsqlWaymo
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3
Execution11 questions · ~114 min
Choose Storage and Protocol StackMedium
Recently asked

Explain how you would choose between storage systems and communication protocols for a distributed platform with competing latency, consistency, and delivery needs.

storage systemsTrade-offscommunication protocolsPalantir technologies
Process High-Volume API InputsMedium
Recently asked

Design and execute a plan to process a large stream of API calls under strict latency and reliability constraints.

data processingapi designperformancePalantir technologies
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4
System Design14 questions · ~144 min
Disease Spread Tracking SystemHard
Recently asked

Tests your ability to design scalable data pipelines, models, and services for public health analytics.

system designscalabilityarchitecturePalantir technologies
Food Delivery App API DesignHard
Recently asked

Tests your system design and API modeling skills for a consumer delivery workflow.

system designPalantir technologies
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5
Behavioral & Leadership4 questions · ~41 min
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The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.