System design

Roblox System Design Questions

Every system design problem candidates reported at Roblox between September 2025 and September 2026, most-asked first. Each one links to a full solution. Tick them off as you go.

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I'm Alex. I'll pick one of these Roblox questions and interview you on it: scope, design, and deep dives.

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6problems
8candidate reports
2asked more than once
10topics
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Companies

Meta26Microsoft24Amazon23OpenAI22Google20TikTok16Salesforce15Anthropic15Uber12LinkedIn11Apple11JPMorgan11Atlassian11Snowflake9Netflix9Oracle9Goldman Sachs8Rippling8Databricks7Walmart7Airbnb7Capital One7NVIDIA6Pinterest6Roblox6Flipkart4Bloomberg4Visa4Adobe4Anduril1

Topics

Design Multi-Dimensional Request Rate Limiting
2 reports · last seen May 2026Rate LimitingDistributed SystemsAPI Design
Intermediate+9▶ Mock
Design a Scalable Likes System
2 reports · last seen Apr 2026Distributed SystemsCachingDatabases
Intermediate▶ Mock
Design a Real-Time Shared To-Do List
1 report · last seen Aug 2026API DesignReal-timeCollaboration
Beginner▶ Mock
Design a Played-By Summary System
1 report · last seen Jun 2026Distributed SystemsCachingReal-time
Intermediate▶ Mock
Design a Reusable Dropdown Menu Component
1 report · last seen Jun 2026FrontendAPI Design
Intermediate▶ Mock
Design favorites and social game recommendations
1 report · last seen Feb 2026AI / MLData PipelinesDistributed Systems
Advanced▶ Mock

Duplicate reports of the same problem are merged and counted.

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Frequently Asked Questions

What system design questions does Roblox ask?

Candidates reported 6 distinct system design problems at Roblox between September 2025 and September 2026, including Design Multi-Dimensional Request Rate Limiting, Design a Scalable Likes System, Design a Real-Time Shared To-Do List.

How to prepare for Roblox system design interview?

Start with the Roblox problems reported most often, work through each full solution, then practice explaining a design end to end under time pressure in a mock interview.

What is the difference between HLD and LLD at Roblox?

HLD (High-Level Design) focuses on system architecture, scalability, and component interactions. LLD (Low-Level Design) dives into class diagrams, API contracts, and database schemas. Roblox tests both.