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Updated weekly · Last refresh Sep 10

Twitch Mobile Engineer Interview Questions

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

32questions
~7htotal time
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1
CodingStart here. 18 questions · ~232 min
LRU Cache Eviction PolicyEasy
Practice

Build a custom LRU cache for Twitch chat data with O(1) get and put operations.

cachingAlgorithmsTwitch
In-Place URL Encode SpacesEasy
Practice

Replace spaces in a Twitch chat buffer with %20 in place using backward two-pointer traversal.

string manipulationTwitch
Kth Largest in Unsorted ArrayMedium
Practice

Use Quickselect to find the kth largest value in an unsorted OpenX bid array without fully sorting it.

ArraysSearchingHeapTwitch
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2
Behavioral & Leadership10 questions · ~129 min
Owning a Production Mobile BugEasy

Tests ownership during a production incident, including rollback judgment, stakeholder communication, and disciplined root cause analysis.

CommunicationOwnershipRisk AssessmentTwitch
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3
More topics4 questions · ~52 min
Design a Stock iOS AppMedium

Assesses your product sense and ability to design a mobile app architecture for a real feature set.

user experienceTwitch
Favorite and Least Favorite AppsMedium

Evaluates your product instincts and ability to critique app architecture and tradeoffs.

user experiencearchitectureTwitch
Android Activity LifecycleEasy

Tests deep Android knowledge and ability to reason about UI state during configuration changes.

CommunicationOwnershipTwitch
Process vs Thread on MobileEasy

Tests understanding of concurrency primitives and mobile OS execution model.

CommunicationDealing With AmbiguityTwitch

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