Designing Stateless Serverless APIs with Azure Functions

Introduction

Serverless architectures reduce cost and simplify operations. This article outlines a scalable pattern using Azure Functions.

The Architecture

1. API Gateway: Receives incoming requests and performs authorization checks.
2. Azure Service Bus: Buffers requests in a highly available queue.
3. Azure Functions: Processes messages asynchronously, scaling up and down to match queue load.

Key Benefits

• Cost Efficiency: No idle server costs.
• Resilience: If database updates fail, messages are retried automatically rather than lost.