Criteo Backend Engineer Interview Questions

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

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-offs

Medium

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

nosqldatabasesql

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High Throughput, Low Latency Architecture

Hard

Assesses your system design trade-offs for performance-critical services.

latencythroughputarchitecture

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Evaluates your ability to optimize backend code for tight latency constraints.

Efficient Integer Array Operation

Medium

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

Arraysefficiencyoptimization

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Implement a Criteo-Style Algorithm

Medium

Assesses your coding ability to translate real production needs into correct algorithms.

implementation

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Sub-Millisecond Latency Optimization

Hard

Assesses your performance engineering mindset for extremely low-latency systems.

performance

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Load Balancing Strategies

Medium

Tests your understanding of distributed systems and performance and availability trade-offs.

InfrastructureTrade-offsRisk Assessment

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