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Criteo Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 27 questions · ~217 min
Array Search and OptimizationMedium

Tests your approach to algorithm selection, complexity analysis, and performance tradeoffs.

ArraysSearchingoptimizationCriteo
Search in Sorted Rotated ArrayMedium

Tests your ability to apply binary search variants and reason about time complexity.

ArraysSearchingCriteo
Flood Fill on a GridMedium

Tests your ability to design graph or grid traversal algorithms and handle boundaries.

Criteo
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2
System Design13 questions · ~105 min
Model Online Poker SystemsHard

Evaluates system modeling skills for a real-time online gaming domain.

Criteo
Stream-Aware List ProcessingHard

Assesses distributed systems thinking for stream processing and large-scale computation.

distributed systemsCriteo
Draw Out Implementation During DesignMedium

Evaluates how you structure ambiguous design discussions and translate them into actionable implementation.

implementationCriteo
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3
Behavioral & Leadership8 questions · ~64 min
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4
More topics2 questions · ~16 min
Process Data Larger Than RAMHard

Tests your ability to design scalable data processing strategies under memory constraints.

data processingperformancescalabilityCriteo
Databases and Hashing BasicsMedium

Assesses understanding of core database concepts and hashing behavior relevant to software design.

databaseshashingCriteo

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
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
Pivot Lucid Campaign Performance by MonthMedium
Practice
Practice drill

Use joins, a CTE, CASE expressions, and monthly pivoting to compare Lucid campaign performance across channels.

pivot tablesnull handlingData WranglingLucid Motors
Unify Campaign Performance SourcesMedium
Practice
Practice drill

Use CTEs, joins, aggregations, and CASE logic to combine Salesforce, Marketo, and Google Analytics into one monthly campaign report.

Data WranglingperformanceReconciliationPalo Alto Networks
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.