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Updated weekly · Last refresh Sep 24

OfferUp Backend Engineer Interview Questions

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

35questions
~5htotal time
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1
CodingStart here. 9 questions · ~83 min
Word Ladder 2 ImplementationHard
Practice

Use level-order BFS and backtracking to return every shortest word transformation sequence for OfferUp search suggestions.

leetcodeStringsstring manipulationOfferUp
String Manipulation for Word LadderHard
Practice

Find the shortest word transformation path using wildcard indexing, BFS distances, and lexicographic tie-breaking.

StringsbfsOfferUp
Implement Rate LimitingHard

Tests designing and implementing rate limiting that balances abuse prevention and user experience.

apirate limitingOfferUp
Recursive Problem Solving with DFSMedium

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

RecursiondfsOfferUp
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2
System Design13 questions · ~120 min
Real-Time Notification SystemHard

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

architectureOfferUp
Handle Data Consistency in MarketplaceMedium

Evaluates strategies for consistency, transactions, and correctness in a marketplace context.

distributed systemsdata consistencyOfferUp
Scale for Billions of DevicesHard

Evaluates system design thinking for extreme scale and operational collaboration across teams.

scalabilityarchitectureOfferUp
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3
Behavioral & Leadership13 questions · ~120 min
Resolving Cross-Functional Product ConflictMedium

Tests conflict resolution in cross-functional product work, including influence, communication, and preserving momentum under disagreement.

Conflict ResolutionStakeholder ManagementCommunicationOfferUp
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The finish line: interview-readyComplete all 35 questions to finish this plan.