Infrastructure as Code is now a core skill for modern software engineers. Whether you're deploying a simple service or scaling a production system, you need infrastructure that is consistent, repeatable, and version-controlled. Terraform makes that possible. I originally came from a frontend-heavy background, and my first steps into AWS were through the console - clicking around, creating resources manually, and forgetting how I did it the next day. Terraform changed everything. It gave me a way to understand AWS through code, build mental models slowly, and create infrastructure I could share and reuse. What you'll build In this guide, we'll build a simple yet complete web application infrastructure on AWS using Terraform. We will build what is called a three-tier application, as in the diagram above. The three tiers are: Presentation Tier : This is the front door to your application.…