18real ML & LLM system design problems — each with a structured editor, FAANG framework, architecture snippets, a 45-minute timer, and AI review of your answer.
1.Write your design
Markdown editor + 45-min interview timer
2.Check key areas
Interactive must-cover checklist
3.Drop in components
12 ready architecture snippets
4.Get AI review
Scores 5 sections + interviewer note
Design LLM Serving at Scale
Design a Production RAG System
Design a ChatGPT-Like Product
Design a Multi-Tenant LLM API Gateway
Design YouTube Video Recommendation
Design Real-Time Fraud Detection
Design Search Ranking System
Design Ads CTR Prediction Pipeline
Design Real-Time ML Feature Pipeline
Design Google Search Personalization
Design Uber ETA Prediction
Design Content Moderation at Scale
Design Spotify Song Discovery Engine
Design Instagram Feed Ranking
Design an AI Agent Platform
Design a Vector Search Engine
Design an AI Coding Assistant (Copilot)
Design an AI Image Generation Service
Expand any System Design problem above to open its dedicated workspace — structured editor, must-cover checklist, 45-minute timer and AI review of your answer.