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Updated weekly · Last refresh Aug 30

Criteo Machine Learning Engineer Interview Questions

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

24questions
~3htotal time
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1
System DesignStart here. 4 questions · ~32 min
Design Feature Drift Monitoring SystemHard

Design a production ranking system with robust feature drift monitoring across batch and real-time features at high QPS.

Feature StoreFeature DriftModel ServingCriteo
Real-Time Content Moderation SystemHard

Tests system design skills for low-latency ML-driven moderation pipelines.

Stream ProcessingModel ServingCriteo
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2
Machine Learning4 questions · ~32 min
SGD vs RMSprop vs AdamMedium

Tests ability to compare optimizers and reason about their behavior.

Deep LearningGradient DescentoptimizationCriteo
Logistic Regression Formulation and OptimizationMedium

Tests understanding of logistic regression math and optimization methods.

RegularizationSupervised LearningGradient DescentCriteo
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3
Coding5 questions · ~40 min
Merge Multiple Sorted StreamsHard

Tests ability to design scalable merging algorithms and analyze complexity.

SortingHeapCriteo
Peak Element in an ArrayMedium

Tests knowledge of array algorithms and efficient search strategies.

ArraysSearchingGreedyCriteo
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4
Behavioral & Leadership9 questions · ~72 min
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5
More topics2 questions · ~16 min
Model Calibration for CTRMedium

Tests ability to connect calibration to CTR quality and decision-making in ad ranking.

ClassificationCalibrationModel MetricsCriteo
Evaluation Metrics and ScalabilityMedium

Assesses metric selection, complexity reasoning, and scalability considerations for production ML.

scalabilityCriteo

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