Case Study: Notification Platform

Overview

Design multi-channel notification fanout with priority queues, worker dispatch, and delivery analytics.

Notification systems look simple until channel heterogeneity, retries, and user preferences collide.

You will build 8 architecture steps that model production dependencies.

You will run 1 failure experiment to observe bottlenecks and recovery behavior.

Success target: Critical notifications stay low-latency while standard traffic remains durable with measurable delivery outcomes.

Learning Objectives

• Can design multi-channel fanout architecture
• Can justify queue priority/retry strategy
• Can explain operational analytics loop for notification quality

Prerequisites

• Topic Hub: fanout
• Chapter 31: Case Study - Notification System
• Prior Lab: Security, Authentication & Encryption
• Prior Lab: Batch + Stream Dual Path

Experiments

1. Disable queue retries and observe failed notification loss