AWS CDK · TypeScript & Python

The engaging way to learn infrastructure as code.

Build real cloud infrastructure with AWS CDK — and get real feedback from our own validation engine on every attempt.

Start with Concepts Browse Projects

Starting with AWS CDK — Pulumi, Terraform & multi-cloud next

Concepts Projects

Projects

Walkthroughs

Self-contained projects that teach the fundamentals. Finish one in a sitting or two.

Walkthroughs

Town Crier v2

The full arc: a Lambda behind a REST API, a hand-written construct with real asset-backed handlers, IAM grants, a validated prop, a real TDD test suite, tags and a custom Aspect, a cross-stack split, an L1 escape hatch, and a CDK Pipeline that actually deploys it — in your own repo.

10 stageslambda · apigateway · dynamodb · iam · codepipeline

Developer

Multi-part series that go deep on building real services on AWS. Each part builds on the last.

DeveloperExercise in Membership

Marginalia: The Counter v2

Build the counter that answers questions about H.'s book catalog: six real, individually bundled clerks (Lambda functions), a shared response contract with CORS baked in, a data-access module of your own, outcome-specific error handling, a real Jest test suite, and the front desk (API Gateway) that routes every knock — including the browser asking permission first — to the right clerk. Deeper than v1: every handler is a real, asset-backed file, not inline code.

10 stageslambda · apigateway