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Updated weekly · Last refresh Aug 30

McKinsey & Company Software Engineer Interview Questions

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

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~2htotal time
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1
System DesignStart here. 5 questions · ~40 min
Design a URL Shortening ServiceHard

Design a URL shortening service that routes, ranks, and monitors links at scale.

Feature StoreModel ServingMcKinsey & Company
Consistency During Network PartitionsHard

Tests your understanding of distributed consistency models and partition tolerance strategies.

Networkingdistributed systemsdata consistencyMcKinsey & Company
Real-Time Notifications ArchitectureHard

Tests your system design skills for real-time delivery, scalability, and global reliability.

system designscalabilityMcKinsey & Company
SQL vs NoSQL Trade-OffsMedium

Tests your ability to choose data storage technologies based on requirements and constraints.

nosqlsqldatabase designMcKinsey & Company
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2
Coding4 questions · ~32 min
Graph Traversal ImplementationMedium

Tests your ability to implement graph algorithms and justify data structure choices.

Data StructurestraversalGraphsMcKinsey & Company
Optimize Search Over Large DataMedium

Tests your ability to design efficient search and indexing strategies for large datasets.

SearchingData StructuresoptimizationMcKinsey & Company
Dynamic Programming State LogicHard

Tests your ability to derive DP states and transitions for complex optimization problems.

Dynamic ProgrammingAlgorithmsMcKinsey & Company
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3
Behavioral & Leadership5 questions · ~40 min
Balancing Technical Debt and DeadlineMedium

Tests prioritization under pressure, technical judgment, and stakeholder management when technical debt threatens a client deadline.

client deadlineConflict Resolutiontechnical debtMcKinsey & Company
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The finish line: interview-readyComplete all 14 questions to finish this plan.