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Updated weekly · Last refresh Aug 30

Xero Data Engineer Interview Questions

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

23questions
~3htotal time
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1
PipelinesStart here. 6 questions · ~52 min
Data Quality and Schema EvolutionMedium

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

schema evolutionData ModelingQualityXero
Python vs Scala PipelinesMedium

Tests language choice reasoning for scalable transformations, performance, and maintainability.

ToolstransformationsperformanceXero
Data Lake Partition StrategyMedium

Tests data modeling and partitioning decisions that improve analytics performance and cost.

performancepartitioningData ModelingXero
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2
Behavioral & Leadership13 questions · ~114 min
Disagreeing on a Technical DirectionMedium

Tests conflict resolution and influence during technical disagreement, including how you challenge decisions and commit after alignment.

Influence Without AuthorityConflict ResolutionteamworkXero
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3
More topics4 questions · ~35 min
Deduplicate Ordered Event StreamEasy
Practice

Use a hash set to remove duplicate Meta event records from a stream while preserving first-seen order.

Hash TablesArraysStringsXero
SQL Join Types in Claims ReportingMedium

Explain INNER, LEFT, RIGHT, FULL OUTER, CROSS, and SELF JOINs using finance reporting examples and null-handling implications.

SubqueriesJoinsSelf-JoinsXero
Optimize Large SQL AggregationsHard

Tests query optimization skills for high-volume financial datasets and performance troubleshooting.

Performance TuningindexesAggregationsXero
Technical Assessment ScopeMedium

Assesses your ability to communicate technical work and reasoning during a structured assessment.

technical assessmentXero

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Second-Highest Transaction Amount QueryMedium
Practice
Recently asked
Practice drill

Find the second-highest distinct transaction amount using a subquery in PostgreSQL without LIMIT.

SubqueriesRankingsalaryCapgemini FSSBUFreechargeNPCI
SQL Join and Grouping QueryMedium
Practice
Practice drill

Use LEFT JOINs and COUNT DISTINCT to count games with under 10 hours of playtime for each console.

aggregationsql queriesXero
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
The finish line: interview-readyComplete all 23 questions plus 3 hands-on drills to finish this plan.