Criteo Backend Engineer Interview Questions

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

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CodingStart here. 6 questions · ~55 min

Find the unique common values in two sorted integer lists using a linear two-pointer scan.

Efficient Integer Array OperationMedium

Tests your problem-solving and algorithmic efficiency for array-based tasks.

Arraysefficiencyoptimization

Criteo

Optimize to Improve ComplexityHard

Tests ability to identify bottlenecks and apply more efficient algorithms.

time complexityoptimization

Criteo

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System Design10 questions · ~92 min

Design an agentic ad bidding system that makes real-time bid adjustments at very high scale with strict latency and reliability needs.

SQL vs NoSQL Trade-offsMedium

Assesses your data modeling and storage decisions based on workload requirements.

nosqldatabasesql

Criteo

Memory Constraints for Large Data StreamsHard

Evaluates your strategies for streaming processing under tight memory limits.

memory managementdata streams

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Behavioral & Leadership3 questions · ~28 min

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