Design a Game Recommendation System
Company: Roblox
Role: Machine Learning Engineer
Category: ML System Design
Difficulty: medium
Interview Round: Onsite
Overview: This question evaluates mastery of designing scalable end-to-end machine learning recommendation systems, including candidate generation, multi-stage ranking, feature and label design, cold-start and long-tail handling, safety and age-appropriateness constraints, evaluation strategies, and production monitoring.
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