Top 19

Prep plan

Updated weekly · Last refresh Aug 30

Extend Software Engineer Interview Questions

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

19questions

~3htotal time

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System DesignStart here. 7 questions · ~57 min

Distributed Transactions for PurchasesHard

Tests understanding of consistency patterns and transaction handling across microservices.

distributed systemsdata consistencymicroservices

Extend

Scalable Webhook API DesignHard

Tests system design for high-throughput webhook ingestion and reliable API architecture.

APIsscalability

Extend

Rate Limiting for Traffic SpikesHard

Tests ability to design protective controls for bursty traffic and downstream stability.

scalabilityrate limiting

Extend

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Behavioral & Leadership7 questions · ~57 min

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More topics5 questions · ~41 min

Testable Lambda ETL PipelineMedium

Tests ability to build maintainable serverless data pipelines with good testing practices.

Data QualityAPIs

Extend

Traverse and Manipulate DOMMedium

Tests coding ability to work with nested data structures and DOM traversal logic.

RecursionjavascriptTrees

Extend

Optimize Slow Node.js QueriesMedium

Tests performance troubleshooting and optimization techniques for backend services.

APIsperformancequery optimization

Extend

Parse Catalog to Warranty CategoriesMedium

Tests coding skills for parsing, transformation, and mapping business data to internal models.

parsingStringsData Structures

Extend

Serverless Background Tasks with LambdaMedium

Tests serverless architecture skills for asynchronous processing and operational considerations.

Extend

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min

Analyze Customer Purchase Trends with Window FunctionsEasy

Practice

Practice drill

Calculate the monthly spending trends for customers using window functions and joins.

The Home Depot

Aviso

World Wide Technology

Top Users by Recent Transaction VolumeMedium

Practice

Practice drill

Find the top 3 users by completed transaction volume in the last 30 days using joins and aggregation.

Data Analysisquery optimizationsqlTTier 1 Bank

Revolut

Chime