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Updated weekly · Last refresh Aug 30

Justworks Data Engineer Interview Questions

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

18questions
~2htotal time
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1
PipelinesStart here. 6 questions · ~48 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityJustworks
Data Quality and Schema EvolutionMedium

Approach for handling schema changes and data quality checks in a high-volume data lake pipeline.

schema evolutionData ModelingQualityJustworks
Debugging Production Data PipelinesMedium

A structured approach to debugging production data pipelines, with focus on orchestration, data quality, idempotency, and safe backfills.

InfrastructureToolsQualityJustworks
Design an End-to-End Data PipelineMedium

Approach for designing an end-to-end data pipeline from ingestion through transformation, storage, and downstream consumption.

data pipelinedesigningestionJustworks
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2
SQL & Data Manipulation3 questions + 3 drills · ~54 min
Ensuring High-Volume Data QualityMedium

Assesses how you prevent and detect data issues in large-scale production systems.

Data Qualityproduction environmentJustworks
Warehouse Modeling Trade-OffsMedium

Evaluates your understanding of modeling choices and their impact on performance and usability.

Trade-offsData ModelingJustworks
Optimizing Distributed QueriesMedium

Tests your ability to improve performance through query and system-level techniques.

performancequery optimizationJustworks
Contact Center Agent Performance MetricsHard
Practice
Practice drill

Compute daily agent call KPIs and SLA using joins, aggregations, and window ranking in a contact center model.

ETLAggregationsData ModelingADP
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
Resolve Conflicting Customer AttributesMedium
Practice
Practice drill

Use joins, CTEs, and row ranking to resolve conflicting customer profile values across ACME House systems.

JoinsData WranglingQualityRamsey SolutionsACME House

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3
Behavioral & Leadership9 questions · ~72 min
Leading an Ambiguous Technical ProjectMedium

Tests leading through technical ambiguity by creating clarity, prioritizing decisions, and driving aligned execution under uncertainty.

technical ambiguityLeadershipProject ManagementJustworks
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The finish line: interview-readyComplete all 18 questions plus 3 hands-on drills to finish this plan.