Top 17
Prep plan
Updated weekly · Last refresh Oct 17

Headway Data Scientist Interview Questions

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

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1
A/B Testing & ExperimentationStart here. 6 questions · ~52 min
Design Test for New FeatureMedium

Design an A/B test for a new platform feature, including success metrics, power, guardrails, and a clear ship decision.

experiment designfeature evaluationA/B TestingHeadway
Common Pitfalls in Experiment ResultsHard

Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.

PeekingNovelty EffectSample Ratio MismatchHeadway
Assessing Statistical SignificanceHard

Explain how to select, execute, and interpret statistical significance tests for A/B test results.

experiment designGuardrail MetricsData AnalysisHeadway
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2
Product Sense3 questions · ~26 min
Measuring Subscription CannibalizationHard

Design a measurement approach to determine whether a new therapist subscription shifts revenue from Headway’s existing services.

product metricsproduct analysisMetricsHeadway
Balancing Outcomes and EngagementHard

Explain how to prioritize long-term clinical outcomes when short-term engagement metrics point in a different direction.

MetricsFeature Prioritizationuser valueHeadway
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3
Behavioral & Leadership5 questions · ~44 min
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4
More topics3 questions · ~26 min
Investigate User Engagement DeclineMedium

Investigate a 15% engagement decline by decomposing the metric, isolating root causes, and proposing actions.

RetentionDiagnosisEngagement MetricsHeadway
Optimizing Large Sparse Table JoinHard
Practice

Optimize a PostgreSQL claims-to-activity join by filtering both sources and preventing duplicate claim rows.

data relationshipsdatabase optimizationJoinsHeadway
Diagnosing a Drop in Session BookingsHard

Diagnose a 5% session booking decline by validating the metric, decomposing the funnel, and testing root-cause hypotheses.

Funnel Analysisroot cause analysisConversion RateHeadway

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