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Updated weekly · Last refresh Oct 17

The Grw Group Software Engineer Interview Questions

The questions to prepare for a The Grw Group Software Engineer interview. Questions from real interview reports rank first. Updated daily.

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1
SQL & Data ManipulationStart here. 3 questions + 3 drills · ~54 min
Data Integrity in Dataset TransfersHard

Tests your approach to validation, consistency, and integrity during large-scale data migrations and transfers.

Data Wranglingdata integrityCloudThe Grw Group
Geospatial Database Schema DesignHard

Tests your ability to model and query structured geospatial data efficiently in a database schema.

schema designperformanceData ModelingThe Grw Group
Optimize Slow Queries and ScriptsMedium

Tests your performance tuning skills for databases and data processing pipelines.

Performance Tuningdata processingquery optimizationThe Grw Group
Refactoring a Slow QueryMedium
Practice
Practice drill

Refactor a slow Candid Health claims query using pre-aggregation, latest-event logic, and monthly payer metrics.

Performance Tuningdatabase optimizationCTEsCandid Health
Schema Design for User ActivityHard
Practice
Practice drill

Design normalized activity tables and query each user's recent activity count and latest event efficiently.

database optimizationschema designquery optimizationAmazon Web Services
Optimize Large SQL QueryHard
Practice
Practice drill

Optimize a billion-row AWS query by reducing scanned data, pre-aggregating requests, and preserving daily performance metrics.

Performance Tuningdatabase optimizationdata processingAmazon Web Services
2
Behavioral & Leadership6 questions · ~48 min
Resolving Technical Conflict Between EngineersMedium

Tests conflict resolution in technical leadership: mediating disagreement, driving a decision, and preserving team trust and execution.

Conflict ResolutionCommunicationLeadershipThe Grw Group
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3
More topics4 questions · ~32 min
Refactor Legacy Without DocsHard

Tests your strategy for safely improving undocumented legacy systems while minimizing operational risk.

code qualitylegacy systemsdocumentationThe Grw Group
Scalable Monitoring Data PipelineHard

Tests your ability to design scalable ingestion, processing, and reliability for continuous monitoring data.

Stream ProcessingmonitoringarchitectureThe Grw Group
Custom Tool for Third-Party APIMedium

Tests your approach to integrating with proprietary APIs, designing interfaces, and ensuring reliability.

api integrationsolution designtechnical experienceThe Grw Group
Build vs Buy DecisionMedium

Tests your judgment in selecting between custom builds and off-the-shelf solutions for engineering delivery.

Trade-offssolution designScope ManagementThe Grw Group

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The finish line: interview-readyComplete all 13 questions plus 3 hands-on drills to finish this plan.