Netflix Home Page Recommendation — System Design Problem

System Requirements

Sub-100ms cold-start page assembly across TV, mobile, and web
Dynamic row hierarchy based on contextual signals (time, device, location)
Bandit algorithms for personalized artwork selection per movie
Offline matrix factorization combined with real-time stream scoring

Graded Constraints

01Cost threshold: $40,000/month

02Global CDN for media assets and artwork

03Microservice orchestration mesh with fallback fallback caching

04High-speed distributed cache for profile state and recommendation pre-computation

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