Design User Re-engagement Notifications
Company: Microsoft
Role: Software Engineer
Category: System Design
Difficulty: medium
Interview Round: Onsite
Design a re-engagement system for an AI assistant product.
The system should support at least two use cases:
1. Send relevant notifications to inactive users to encourage them to return.
2. Send reminder notifications when a user states or implies a reminder inside an AI chat, such as asking the assistant to remind them later.
Cover requirements, high-level architecture, data models, reminder extraction, scheduling, notification delivery, user preferences, rate limiting, metrics, privacy, reliability, and scalability.
Quick Answer: This question evaluates a candidate's ability to design end-to-end re-engagement and reminder notification systems, assessing competencies in system architecture, data modeling, scheduling and delivery pipelines, reminder extraction from natural language, user preferences, rate limiting, metrics, privacy, reliability, and scalability.