I’m Writing a Book on WebAssembly and Spin

Sat, 15 Aug 2026 14:05:00 +0200

Hey friends 👋🏼,

If you’ve been following my activities over the recent years, you know I can’t stop talking about the third wave of cloud computing. Server-side WebAssembly is completely changing the game for cold-start latency and container bloat.

Today, I’m thrilled to announce I’m turning those talks and architectural patterns into a practical, hands-on guide:

Building Serverless Applications With WebAssembly & Spin

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Instead of theoretical fluff, I structure the book in a way that readers will build a complete, multi-component serverless application from the ground up using Rust and Spin.

Component Composition with Spin 4.0

Fri, 14 Aug 2026 19:15:00 +0200

Thanks to the WebAssembly Component Model we can stitch together multiple WebAssembly Components. Reusing Wasm Components boost developer velocity dramatically while language barriers vanish. In this hands-on article, I’ll explain how you can compose Wasm Components using Spin 4.0.

What You Need To Follow Along

I’ll try to keep things as simple as possible. That’s why we’ll implement both components using Rust, resulting in the following - short - list of requirements:

WebAssembly Component Model on Thorsten Hans

I’m Writing a Book on WebAssembly and Spin

Building Serverless Applications With WebAssembly & Spin

Sign up and Stay in the Loop

Component Composition with Spin 4.0

What You Need To Follow Along