Design a Sequential Personalized Playlist Recommender
Company: Spotify
Role: Machine Learning Engineer
Category: ML System Design
Difficulty: medium
Interview Round: Onsite
Overview: Design a real-time ML system that selects and orders a personalized 10-track playlist from 10,000 candidates. Cover sequence-aware reranking, behavioral labels and bias, diversity constraints, latency fallbacks, evaluation, and responsible feature use.