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OfferUp Backend Engineer Interview Questions

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

Pivoting Under Changing Requirements
Medium

Tests adaptability under changing requirements, with emphasis on prioritization, ambiguity management, and ownership during a technical pivot.

technical approachadaptabilityrequirements change
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Real-Time Notification SystemHard

Tests system design for event delivery, fanout, ordering, and reliability.

architecture
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Database Architecture Trade-offs
Medium

Assesses understanding of data modeling, consistency, and performance trade-offs for mobile workloads.

mobile-firstTrade-offsdatabase architecture
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Ensuring Consistency in Microservices
Medium

Tests your understanding of distributed data consistency, failure modes, and practical mitigation strategies.

system designdata consistencymicroservices
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Distinct Cycles Including NestedHard

Evaluates graph theory reasoning and algorithm design for counting cycles.

dfsGraphs
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Recursive Problem Solving with DFS
Medium

Tests DFS fundamentals, recursion correctness, and ability to reason about traversal.

Recursiondfs
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Word Ladder II Shortest Paths
Hard

Tests graph modeling and shortest path reasoning with string transformations.

shortest pathStrings
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Efficient Search Algorithms
Medium

Assesses ability to choose and implement search strategies for large datasets.

efficiencysearch
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