Nextdoor Mobile Engineer Interview Questions

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

30questions

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CodingStart here. 16 questions · ~157 min

Cycle Detection in Dependency GraphEasy

Practice

Use iterative DFS coloring to detect circular dependencies in an Applied Intuition simulation module graph.

dfsbfsGraphs

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Merge Overlapping IntervalsEasy

Practice

Merge overlapping intervals in a list of intervals.

ArraysSearchingSorting

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Format Credit Card InputMedium

Assesses input validation, formatting rules, and edge-case handling in mobile code.

function implementation

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Behavioral & Leadership10 questions · ~98 min

Driving Better Mobile Design DecisionsMedium

Tests ownership and influence in improving mobile code quality under delivery pressure, with emphasis on communication and maintainability trade-offs.

mobile projectscode qualitysolid principles

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More topics4 questions · ~39 min

Concurrency and Background WorkMedium

Tests your understanding of concurrency primitives and safe background execution on mobile.

backgroundCommunicationtechnical experience

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Mobile Performance InstrumentationMedium

Tests your ability to measure and diagnose mobile performance using instrumentation and metrics.

KPILeading IndicatorsDiagnosis

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Choosing State Management PatternsMedium

Tests your ability to select and apply appropriate architecture and state management patterns.

Decision MakingbackgroundCommunication

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Retain Cycles and Memory LeaksMedium

Tests your ability to diagnose and fix memory issues in mobile apps.

backgroundCommunicationtechnical experience

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