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Prep plan
Updated weekly · Last refresh Sep 23

OfferUp Software Engineer Interview Questions

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

38questions
~6htotal time
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1
CodingStart here. 17 questions · ~160 min
String or Array TraversalMedium
Practice

Find the longest substring without repeated characters using a sliding window and last-seen index map.

string manipulationOfferUp
Merge Two Sorted Linked ListsEasy
Practice

Merge two sorted singly linked lists into one sorted list by relinking existing nodes.

RecursionLinked ListsSortingOfferUp
Grid Paths With ConstraintsHard
Practice

Count monotonic grid paths that stay on or above the diagonal using one-dimensional dynamic programming.

combinatoricsDynamic ProgrammingAlgorithmsOfferUp
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2
System Design5 questions · ~47 min
Implement Read-Write Lock With One LockMedium

Tests concurrency control design and correctness under contention.

concurrencyOfferUp
Monolith vs Microservices and Directory AccessMedium

Evaluates system design fundamentals and secure handling of directory access.

architecturemicroservicesOfferUp
Database Architecture Trade-OffsHard

Evaluates your ability to choose and justify data storage approaches under demanding workloads.

Trade-offsdatabase architectureOfferUp
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3
Execution3 questions · ~28 min
Front a Public Database With a Web ServiceEasy

Assesses ability to design and implement a basic service layer over a database.

databaseOfferUp
Explaining Big O ComplexityMedium

Evaluates algorithmic reasoning and ability to justify complexity.

technicalData StructuresbehavioralOfferUp
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4
Behavioral & Leadership13 questions · ~122 min
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The finish line: interview-readyComplete all 38 questions to finish this plan.