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Brex Data Analyst Interview Questions

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

15questions
~2htotal time
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1
MetricsStart here. 3 questions · ~25 min
Metrics for a New LaunchEasy

Define the core metrics for a new product launch, from early adoption and activation to retention and long-term value.

Lagging IndicatorsKPIsLeading IndicatorsBrex
Investigate User Engagement DeclineMedium

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

RetentionDiagnosisEngagement MetricsBrex
Investigating a Sudden Metric DropMedium

Tests incident-style debugging, root-cause analysis, and validation of data and instrumentation changes.

root cause analysisBrex
2
Behavioral & Leadership7 questions · ~58 min
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3
More topics5 questions · ~41 min
Determining A/B Test SignificanceMedium

Explain how to evaluate whether an A/B test result is statistically significant and how to interpret the result.

marketing experimentStatistical SignificanceAnalysisBrex
Structure Retention Cohort AnalysisMedium

Explain how to structure a cohort retention query using cohort assignment, period offsets, and aggregation in PostgreSQL.

Date FunctionsCTEsGroup ByBrex
Building Dashboards From ScratchMedium

Tests end-to-end dashboard scoping, requirements gathering, and stakeholder communication.

data visualizationstakeholder communicationdashboard designBrex
Handling Missing Data in SQLEasy

Explain practical SQL techniques for handling NULLs and missing values in product analysis without biasing metrics.

Data WranglingCase WhenAggregationsBrex
Designing Brex Corporate Card HealthMedium

Tests metric design, data modeling choices, and how you translate product health into actionable KPIs.

data visualizationdashboard designBrex

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Calculate 30-Day User RetentionHard
Practice
Practice drill

Use CTEs, joins, and date filtering to calculate 30-day retention by signup cohort from login and feature usage data.

Window FunctionsDate FunctionsAggregationsCurefitReachMobiIndeed
Weekly Signup Cohort RetentionHard
Practice
Practice drill

Calculate weekly retention by signup cohort using CTEs, joins, date truncation, and distinct user counts.

Window FunctionsDate FunctionsAggregationsBrexPostmaneToro
Top Spending Categories SQLMedium
Practice
Practice drill

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

Window FunctionsDate FunctionsRankingBrex
The finish line: interview-readyComplete all 15 questions plus 3 hands-on drills to finish this plan.