{"blocks": [{"key": "ec5824cd", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "5b453171", "text": "Design a scalable Notification System that supports real-time and scheduled messages across multiple channels (email, push, SMS). Detail components, data flow, storage, failure handling, and scaling strategy. Then, draw and explain the end-to-end architecture of one of your past projects, covering services, databases, communication patterns, and answer deep domain-specific follow-up questions.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}