Top 50
Prep plan
Updated weekly · Last refresh Aug 30

Brex Data Scientist Interview Questions

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

50questions
~7htotal time
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1
SQL & Data ManipulationStart here. 7 questions · ~62 min
Top Spending Categories SQLHard
Practice

Use multi-level CTEs, joins, aggregation, and ROW_NUMBER to rank each company's top three net Brex spending categories.

Window FunctionsDate FunctionsRankingBrex
Extract Repeat Transaction TrendsMedium
Practice

Use joins, monthly aggregation, and LAG to measure repeat Brex users and month-over-month spending trends.

sqlBrex
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2
Metrics8 questions · ~71 min
Evaluate LTV Impact of a Product ChangeMedium

Assess whether a product change improved LTV and separate true lift from retention, monetization, and cohort effects.

RetentionDiagnosisLTVBrex
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3
Pipelines7 questions · ~62 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityBrex
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4
Product Sense7 questions · ~62 min
Prioritize User Problems with DataMedium

Framework for using product data to identify and prioritize the user problem that should be solved first.

Feature PrioritizationUser NeedsPain PointsBrex
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5
Statistics & Probability7 questions · ~62 min
Seasonality in Growth ExperimentsHard

Reason about how seasonality can bias experiment reads and how to design analysis that separates treatment effects from time patterns.

ExperimentationTime SeriesA/B TestingBrex
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6
A/B Testing & Experimentation5 questions · ~44 min
Design an Installment-Flow ExperimentMedium

Design an A/B test for a new checkout installment-flow feature, including metrics, power, guardrails, and a disciplined ship decision.

ExperimentationHypothesis TestingA/B TestingBrex
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7
More topics9 questions · ~80 min
Take Over a ModelMedium

Assesses your ability to take ownership of an ML model by clarifying assumptions and risks.

collaborationBrex
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