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Updated weekly · Last refresh Oct 17

Waymo Data Engineer Interview Questions

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

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1
SQL & Data ManipulationStart here. 11 questions · ~130 min
Optimizing Joins on Massive TablesMedium
Practice

Optimize a large event-to-segment join by reducing scanned rows and aggregating before joining.

data relationshipsdatabase optimizationlarge datasetsWaymo
Optimize Slow SQL QueriesMedium
Practice

Demonstrate a PostgreSQL approach for optimizing a filtered aggregation query over related tables.

Subqueriesdatabase optimizationJoinsWaymo
Schema for Simulation DatasetsHard
Practice

Design a normalized simulation schema and retrieve each team's latest completed dataset run.

data relationshipsJoinsschema designWaymo
Dimension Table DefinitionEasy
Practice

Identify active records in a Waymo vehicle dimension table and return their descriptive attributes in key order.

sql basicsdata managementsqlWaymo
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2
Pipelines6 questions · ~71 min
Design Petabyte-Scale Log Streaming PipelineHard

Design a Databricks-native real-time log pipeline processing 1.5-3 PB/day with sub-90-second latency, replayability, and strong data quality controls.

InfrastructureStream ProcessingQualityWaymo
Optimize Multi-Terabyte ETL PipelineMedium

Explain how you improved a slow ETL pipeline on multi-terabyte data, including bottleneck analysis, tuning choices, and validation.

ETL optimizationdata processingperformanceWaymo
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityWaymo
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3
Behavioral & Leadership5 questions · ~59 min
Owning a Pipeline Performance FixMedium

Tests ownership in diagnosing and fixing a slow data pipeline, with emphasis on root-cause analysis, communication, and measurable impact.

data pipelinesOwnershipPrioritizationWaymo
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