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Updated weekly · Last refresh Aug 30

Roblox Machine Learning Engineer Interview Questions

The questions to prepare for a Roblox Machine Learning Engineer interview. Questions from real interview reports rank first. Updated weekly.

20questions
~3htotal time
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1
CodingStart here. 3 questions · ~29 min
Sliding Window Max SubarrayEasy
Practice

Find the maximum sum of K consecutive energy readings using a fixed-size sliding window.

Basic AlgorithmsArraysSliding WindowRoblox
LRU Cache for Fast RetrievalMedium
Practice

Implement an LRU cache using a hash map and doubly linked list to support O(1) get and put operations.

Hash TablesSearchingSortingRoblox
Code Signal Style Coding InterviewMedium

Assesses your ability to perform in timed coding interviews and communicate solutions clearly.

leetcodecoding interviewRoblox
2
System Design6 questions · ~58 min
Real-Time Content ModerationHard

Tests your ability to design scalable ML systems for safety, including detection and operational concerns.

Stream ProcessingModel ServingRoblox
Search Ranking for ExperiencesHard

Tests your ability to design and evaluate ML ranking systems using behavioral signals and context.

ML RankingFeature StoreRetrievalRoblox
Churn Prediction and EngagementHard

Tests your ability to build predictive models and translate outputs into actionable retention strategies.

Feature EngineeringRetentionModel ServingRoblox
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3
Behavioral & Leadership10 questions · ~97 min
Technical Trade-off Under DeadlineEasy

Tests prioritization and decision-making under pressure, especially how you balance speed, quality, and long-term technical cost.

Decision MakingTrade-offsstarRoblox
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4
More topics1 question · ~10 min
ML Research-Focused Interview QuestionsMedium

Evaluates how you connect your research work to practical ML interview discussions.

researchRoblox
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