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Updated weekly · Last refresh Aug 30

Roku Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 13 questions · ~112 min
Detect Cycle in Linked ListEasy
Practice

Use Floyd’s two-pointer algorithm to determine whether a singly linked list contains a cycle.

Hash TablesLinked ListsTwo PointersRoku
Sort Singly Linked ListMedium

Tests linked list manipulation and ability to justify time complexity.

time complexityLinked ListsSortingRoku
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2
Execution8 questions · ~69 min
One-Time Subscription Notification SchedulerHard

Tests large-scale event scheduling, reliability, and throughput considerations for user notifications.

SchedulingRoku
High-Traffic Backend Service DesignHard

Tests backend architecture skills including API contracts, caching strategy, and replication for scale.

api designcachingRoku
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3
System Design13 questions · ~112 min
Personalized Recommendation Engine ArchitectureHard

Tests system design for personalization pipelines and handling high-throughput behavioral data.

Feature StoreModel ServingRecommendation SystemsRoku
System Design Scope and ArchitectureHard

Evaluates your ability to structure tradeoffs, requirements, and architecture decisions.

system designarchitectureAlgorithmsRoku
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4
Security & Infrastructure12 questions · ~103 min
TCP Connection Flow ControlMedium

Tests your understanding of TCP behavior and flow control mechanisms.

NetworkingRoku
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5
Behavioral & Leadership3 questions · ~26 min
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6
More topics1 question · ~9 min
SQL Join for Top EarnersEasy
Practice

Use ORDER BY and LIMIT to return Roku's two highest-paid employees.

queriesJoinssqlRoku

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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
SQL Table Query With Filters and AggregatesEasy
Practice
Practice drill

Aggregate Roku Channel viewing by content category for a date range using WHERE, GROUP BY, COUNT, SUM, and AVG.

sqlRoku
SQL for Streaming AnalyticsEasy
Practice
Practice drill

Aggregate Roku streaming minutes by month for Q2 2020, using a join, date filtering, and rounding.

aggregationsqlRoku
The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.