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Updated weekly · Last refresh Aug 30

Brex Interview Questions

The questions to prepare for Brex interviews, across all roles. Questions from real interview reports rank first. Updated weekly.

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1
CodingStart here. 5 questions · ~55 min
2
SQL & Data Manipulation5 questions · ~55 min
Calculate 30-Day User RetentionMedium
Practice

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

Window FunctionsDate FunctionsAggregationsBrex
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3
Pipelines4 questions · ~44 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityBrex
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4
Metrics5 questions · ~55 min
Define Success for a ProjectEasy

Define what success means for a project using clear KPIs, a north star, and supporting metrics.

KPIsSuccess CriteriaDiagnosisBrex
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5
Strategy4 questions · ~44 min
Tell Me About YourselfEasy

Tests your ability to deliver a clear, relevant introduction tailored to the role at Aqr.

Competitive AnalysisGo-to-MarketBrex
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6
Machine Learning4 questions · ~44 min
Supervised vs Unsupervised LearningEasy

Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.

Unsupervised LearningFeature EngineeringBias-Variance TradeoffBrex
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7
More topics23 questions · ~253 min
Balancing Speed Quality and ScopeHard

Describe a time you had to choose between speed, quality, and scope, and how you aligned stakeholders around the trade-off.

Trade-offsRisk AssessmentScope ManagementBrex
Designing for Accessibility at ScaleMedium

Approach for building accessibility into product design through user needs, research, use cases, and measurable outcomes.

User NeedsPain PointsUse CasesBrex
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