1. Introduction

Scaling cloud-native systems often results in a massive, highly interconnected web of services where a single corrupted payload or regional brownout can trigger a global outage. Cellular Architecture mitigates this by decomposing the system into completely independent, isolated failure domains known as "cells." In this tutorial, you will build a highly resilient event-driven architecture using Microsoft Azure, combining the cellular pattern with an asynchronous workflow (Azure Cosmos DB, Azure Functions, and Azure Service Bus).

Instead of relying on a single monolithic data and compute plane, you will deploy multiple identical infrastructure stamps. A thin edge routing layer will inspect incoming requests and route them to the appropriate cell based on a partition key (such as a TenantId ).…