Design scalable notification system evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
##### Question
Design a scalable notification system that can send messages (email, SMS, push) to millions of users with low latency. Cover requirements gathering, high-level architecture, data model, API design, message prioritization, deduplication, retries, failure handling, scaling strategies, monitoring, and cost considerations.
Quick Answer: Design scalable notification system evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
System Design: Low-Latency, Multi-Channel Notification Platform
You are asked to design a scalable, reliable notification system that can send messages to millions of users with low latency across multiple channels (email, SMS, push).
Assume a large, consumer-facing product operating globally with both transactional (real-time) and bulk/marketing use cases.