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Updated weekly · Last refresh Aug 30

Etsy Data Scientist Interview Questions

The questions to prepare for a Etsy Data Scientist interview. Questions from real interview reports rank first. Updated weekly.

50questions
~7htotal time
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1
SQL & Data ManipulationStart here. 4 questions + 2 drills · ~53 min
2
A/B Testing & Experimentation5 questions · ~41 min
Pitfalls in Streaming Experiment AnalysisHard

Identify major online experiment pitfalls and explain how they can bias results in a streaming product A/B test.

Network InterferenceNovelty EffectSample Ratio MismatchEtsy
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3
Machine Learning10 questions · ~82 min
Feature Selection for Supervised ModelsMedium

Explain a practical feature selection process using validation, regularization, and model-based importance to improve generalization.

Cross-ValidationFeature EngineeringRegularizationEtsy
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4
Metrics6 questions · ~49 min
Diagnose a Metric Drop After LaunchMedium

Investigate why a key KPI moved the wrong way after a product change and separate signal from noise.

Lagging IndicatorsLeading IndicatorsDiagnosisEtsy
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5
System Design3 questions · ~25 min
ML Algorithms Coding and System DesignHard

Evaluates breadth across ML, coding, and system design in a single interview flow.

system designEtsy
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6
Behavioral & Leadership16 questions · ~132 min
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7
More topics6 questions · ~49 min
Define Metrics for New FeaturesMedium

Define a success metric for a new feature that captures real user value, not just raw usage.

MetricsFeature Prioritizationuser valueEtsy
Testing Conversion Rate ChangesEasy

Tests hypothesis testing and statistical significance reasoning for conversion metrics.

Hypothesis TestingStatistical SignificanceP-ValuesEtsy
Evaluate a Binary ClassifierMedium

Assesses ability to choose appropriate metrics, thresholds, and validation strategies.

evaluation metricsEtsy
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The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.