Roblox System Design Interview Questions
These are the 13 Roblox system design interview questions AceOffer has reconstructed from candidate reports, sorted by how often each was reported. Like / Unlike System Design leads at 14×. Every question shows when it was last reported; the catalog refreshes monthly.
Key facts
- •13 distinct system design questions indexed
- •60 candidate reports across those questions
- •Most reported: Like / Unlike System Design — 14× (last seen July 2026)
- •Refreshed monthly · last updated August 2026
Which Roblox rounds ask system design questions?
The Roblox rounds below are where these questions come up. Counts are distinct questions, not times asked.
Most reported: Like / Unlike System Design — 14×
Which Roblox system design questions get asked most?
Sorted by candidate-report frequency. Click any question for the full breakdown.
| Question | Round | Reported | Last seen |
|---|---|---|---|
| Like / Unlike System DesignFree Design a scalable like/unlike system (in context of Roblox Marketplace items, games, or generic social media items). Core functional requirements: (1) A… | System Design | 14× | July 2026 |
| Delayed / Scheduled Payment System Design Design a payment system that supports delayed/scheduled payments, primarily in the context of an in-game economy (e.g., Roblox). Core operations include: schedule_payment(from_account,… | System Design | 10× | April 2026 |
| Multiplayer Game Matching System Design Design a matchmaking service for a multiplayer gaming platform (e.g., Roblox) with approximately 1M DAU across many different games. When a user… | System Design | 8× | April 2026 |
| Game / Social Recommendation System Design Design a recommendation system for games (or content) on Roblox. Variants observed across candidates: 1. Full ML pipeline: How do you recommend… | System Design | 8× | May 2026 |
| Todo List / Collaborative To-Do System Design Design a collaborative to-do list application. Users should be able to create to-do lists and individual tasks, share lists with other users,… | System Design | 6× | April 2026 |
| Design Instagram / Image Feed Two major variants observed under the same title: (1) Backend System Design (Instagram): Design Instagram with emphasis on the post feed —… | System Design | 5× | June 2026 |
| Design Notification System Design a real-time notification system from a frontend (and partial backend) perspective. Users should receive notifications triggered by action items such as:… | System Design | 2× | June 2026 |
| Friend Game Engagement Dashboard System Design Design a near real-time game engagement dashboard system. The dashboard displays a list of games; for each game it must show: (1)… | System Design | 2× | November 2025 |
| Photo Album App with Infinite Swipe Design a frontend architecture for a photo album app that supports seamless infinite left/right swiping through photos. The backend (API, storage, etc.)… | System Design | 1× | September 2025 |
| API Design (REST Endpoints) As part of a system design round, candidates may be asked to design REST API endpoints on the spot. This includes defining… | System Design | 1× | February 2026 |
| Online Fraud Detection + Offline Analytics System Design Design a system that supports two workloads simultaneously: (1) real-time (online) fraud detection — scoring/classifying transactions or user actions with low latency… | System Design | 1× | May 2025 |
| Social Game Player Count Display System Design Design a system to power the display line on a game page that reads: 'A, B (your friend) and XXX people have… | System Design | 1× | June 2026 |
| Design an Audio Detection System Design an audio detection system. The prompt is intentionally vague — a single sentence: 'Design an audio detection system.' The candidate is… | System Design | 1× | July 2025 |
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