March 15, 2026 Terraform

Terraform at Scale: Module Patterns for Enterprise

How we structure Terraform codebases for multi-account AWS environments.

Managing infrastructure at scale requires discipline and structure. Terraform modules are the key to maintaining sanity in complex environments.

The Module Hierarchy

We organize our Terraform code into three layers: foundation modules, service modules, and environment configurations. Each layer has distinct responsibilities and constraints.

Versioning Strategy

Learn how to version your modules effectively to enable safe, incremental updates across your infrastructure.

Testing Terraform

Discover tools and techniques for testing your infrastructure code before it reaches production.