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System Design Interview – Notification Service



Topics mentioned in the video:
– Functional (create topic, publish message, subscribe to a topic) and non-functional (high scalability, high availability, high performance, durability) requirements.
– High-level architecture of a notification service.
– FrontEnd service host components (reverse proxy, local cache, logs and metrics agents).
– Metadata service, distributed cache, consistent hashing ring, gossip protocol.
– Storage for messages: SQL/NoSQL database, in-memory store, distributed message queue, stream-processing platform.
– Message sender service, thread pool, semaphore.
– Duplicate messages, retry policy, message order, security, monitoring.

Inspired by the following interview questions:
Amazon (https://www.careercup.com/question?id=5167925411446784)
Flipkart (https://www.careercup.com/question?id=5719043099066368)
Microsoft (https://www.careercup.com/question?id=5139053713293312)
Uber (https://www.careercup.com/question?id=5767908358094848)

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Deok-Hwa SeoArpita ChattopadhyayTed WuVinicius Baggio Fuentes Recent comment authors
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Vinicius Baggio Fuentes
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Vinicius Baggio Fuentes

I had an interview at A Very Big Company that asked me a similar question and this video was extremely helpful.

Ted Wu
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Ted Wu

This is somehow the best system design tutorial I've ever seen. Keep doing bro!

Arpita Chattopadhyay
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Arpita Chattopadhyay

In the temporary storage, I am thinking Apache Kafka might be a good fit, since it can also handle streaming data

Deok-Hwa Seo
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Deok-Hwa Seo

Thanks for the detailed explanation.