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WEX Interview Questions

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

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1
CodingStart here. 5 questions · ~48 min
Palindrome FunctionEasy
Practice
Recently asked

Use two pointers to determine whether a City National Bank reference label reads identically forward and backward.

RecursionStringsTwo PointersWEX
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2
SQL & Data Manipulation5 questions + 2 drills · ~68 min
SQL Rolling Transaction AverageMedium
Practice

Calculate 30-day rolling average transaction volume for WEX Fleet One accounts using aggregation and window functions.

Data ManipulationWEX
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
Analyze Decision Impact by RegionEasy
Practice
Practice drill

Use joins, CASE WHEN, and date filtering to compare outcome rates before and after a decision.

Data WranglingDiagnosisAggregationsHarbourVest Partners
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3
Execution5 questions · ~48 min
Prioritize Work Under Tight DeadlinesEasy
Recently asked

Explain how you prioritize competing work under time pressure while making trade-offs and keeping stakeholders aligned.

Trade-offsRoadmappingScope ManagementWEX
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4
Metrics5 questions · ~48 min
Investigate User Engagement DeclineMedium

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

RetentionDiagnosisEngagement MetricsWEX
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5
Product Sense4 questions · ~38 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 valueWEX
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6
A/B Testing & Experimentation4 questions · ~38 min
Landing Page Conversion Test DesignMedium

Design a landing-page A/B test with clear metrics, power, and significance criteria while guarding against common experiment pitfalls.

Statistical SignificanceSample SizeA/B TestingWEX
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7
More topics22 questions · ~211 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 SignificanceAnalysisWEX
Feature Selection for ML ModelsMedium

Choose useful features for a supervised model and avoid overfitting, leakage, and unstable predictors.

Cross-ValidationFeature EngineeringBias-Variance TradeoffWEX
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The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.