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LinkedIn Backend Engineer Interview Questions

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

20questions
~3htotal time
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1
CodingStart here. 5 questions · ~40 min
Isolate Bottleneck Under ConcurrencyMedium

Tests your ability to identify and validate bottlenecks using profiling and measurement.

performance optimizationDebuggingconcurrencyLinkedIn
Maintain Legacy Module SafelyMedium

Assesses your practices for managing technical debt and keeping legacy code extensible.

code maintainabilitylegacy systemsLinkedIn
Debug a Race ConditionHard

Assesses your approach to reproducing, diagnosing, and fixing concurrency bugs.

DebuggingLinkedIn
Refactor Code Output LogicHard

Tests your ability to refactor and adapt backend logic while preserving correctness.

logicperformanceDebuggingLinkedIn
Object-Oriented Design CodingMedium

Tests your ability to apply OOD principles and adapt during iterative coding discussions.

CodingLinkedIn
2
Behavioral & Leadership13 questions · ~104 min
Balancing Debt Against Feature DeliveryMedium

Tests prioritization and ownership when balancing technical debt with feature delivery under stakeholder pressure.

technical debtfeature deliveryProject ManagementLinkedIn
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3
More topics2 questions · ~16 min
Caching Trade-offs in ConcurrencyMedium

Assesses your understanding of cache correctness, performance, and operational risks at scale.

Trade-offscachingLinkedIn
Peak-Traffic Latency BottleneckMedium

Evaluates your reasoning about system behavior and where latency is introduced.

latencyservice architectureperformance optimizationLinkedIn

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