Coupang Backend Engineer Interview Questions

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

15questions

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System DesignStart here. 5 questions · ~42 min

Evaluates system design skills for a high-throughput, latency-sensitive booking service.

URL Shortening at ScaleHard

Evaluates system design decisions for high-throughput URL shortening at large scale.

scalabilityhigh availability

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Distributed Rate LimiterHard

Evaluates design of distributed throttling with correctness, scalability, and low latency.

distributed systemsscalabilityrate limiting

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SQL vs NoSQL for InventoryMedium

Assesses data model and storage trade-offs for real-time inventory workloads.

Trade-offsdatabase design

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Coding5 questions · ~42 min

Tests problem-solving approach and ability to reason through unfamiliar algorithm challenges.

Memoization for Dynamic ProgrammingMedium

Assesses dynamic programming optimization using memoization to improve time complexity.

Dynamic Programmingoptimization

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Top-K Frequent ElementsMedium

Assesses streaming algorithm design and efficient frequency estimation or selection.

Stream Processingfrequency countAlgorithms

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Behavioral & Leadership5 questions · ~42 min

Pushing Back on Stakeholder DirectionHard

Tests conflict resolution and influence without authority when a stakeholder pushes for a direction the team believes is wrong.

Influence Without AuthorityStakeholder ManagementCommunication

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