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Roblox Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 15 questions · ~131 min
Unique Substring Sliding WindowMedium
Practice
Recently asked

Use a sliding window and last-seen indices to find the longest Roblox chat substring without repeated characters.

Hash TablesStringsSliding WindowRoblox
Minimum Window Substring MatchHard
Practice

Use a sliding window and frequency counts to find the shortest substring containing all characters of t.

Hash TablesDynamic ProgrammingArraysRoblox
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2
Execution14 questions · ~123 min
High-Throughput Likes CounterHard
Recently asked

Tests system design skills for write-heavy aggregation at Roblox scale.

Trade-offsthroughputscalabilityRoblox
Real-Time Global LeaderboardHard
Recently asked

Tests system design for low-latency ranking updates at massive scale.

design systemperformancescalabilityRoblox
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3
System Design14 questions · ~123 min
Distributed Matchmaking DesignHard
Recently asked

Tests ability to design distributed systems for real-time player matching and fairness.

Cold StartFeature StoreRecommendation SystemsRoblox
Team-Specific System Design ScopeMedium

Assesses your ability to tailor system design thinking to operational and delivery needs.

deploymentRoblox
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4
Behavioral & Leadership4 questions · ~35 min
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5
More topics3 questions · ~26 min
CLOS Fabric and DDoSHard

Assesses networking and security fundamentals relevant to large-scale infrastructure.

NetworkingRoblox
CSV Ratings Threshold QueryMedium

Evaluates SQL/data manipulation skills for threshold computation from rating data.

Roblox
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL Top 10% by Session LengthHard
Practice
Practice drill

Find the top 10% of Roblox users by total session length using aggregation and NTILE window functions.

sql queryRoblox
Daily IP Takedown Resolution RateEasy
Practice
Practice drill

Calculate daily Roblox IP takedown resolution rates using a LEFT JOIN, conditional aggregation, and date filtering.

sql queryData AnalysisRoblox
SQL Average Selling PriceMedium
Practice
Practice drill

Calculate weighted average selling prices by product using a date-range join, aggregation, and NULL handling.

leetcodesqlCostarCostar Group
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.