Server-Side WebAssembly

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Building portable and secure multi-language apps
Danilo Chiarlone
Foreword by Brendan Burns
Afterword by Luke Wagner
  • December 2025
  • ISBN 9781633436206
  • 272 pages
  • printed in black & white
  • available in Korean
print book available Dec 16, 2025
ePub + liveBook available Dec 16, 2025

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Look inside
“WebAssembly on the server is the future of computing.”
–Solomon Hykes, founder of Docker


Server-Side WebAssembly shows you how to harness the power of Wasm on the application back-end. By following the numerous practical examples and crystal-clear explanations, you’ll soon be seeing the benefits of reduced cold start times, improved security and performance, and the freedom of polyglot programming.

Inside Server-Side WebAssembly you’ll learn how to:

  • Develop and deploy server-side Wasm applications
  • Create and manage Wasm containers with OCI
  • Compile Wasm components from multiple languages
  • Scale Wasm applications using Kubernetes
  • Deploy Wasm applications across different environments
  • Integrate with databases and machine learning

Server-Side WebAssembly lays out everything you need to take WebAssembly beyond its traditional browser domain. You’ll put on the hats of a systems architect, a backend developer, and even a DevOps engineer to get a full picture of WebAssembly development from both an architecture and development perspective.

about the technology

WebAssembly (Wasm) revolutionized frontend development by enabling secure, high-performance code in the browser. Now it’s doing the same for backend infrastructure as a platform for lightweight, portable applications that run anywhere. In this book, you’ll learn how to build production-grade server-side apps using Wasm.

about the book

Server-Side WebAssembly teaches you to use WebAssembly components and the WebAssembly System Interface (WASI) to build web back ends. You’ll start with Wasm fundamentals and then quickly start building a realistic content management system complete with data storage, HTTP servers, and AI-generated content. As you go, you’ll see how Wasm integrates code from multiple languages and connects naturally with databases, AI/ML systems, and deployment platforms like Kubernetes.

what's inside

  • Integrate components from multiple languages
  • Deploy Wasm applications on Kubernetes
  • Connect Wasm apps to databases and ML systems

about the reader

For intermediate web developers. Code samples in Rust, JavaScript and Python.

about the author

Danilo Chiarlone works at Microsoft on cloud and virtualization technologies and is a contributor to several WebAssembly System Interface (WASI) proposals.

Captures the most recent standards and open-source developments with clear, approachable explanations, diagrams, and code samples.

Luke Wagner, W3C WebAssembly WG co-chair

Everything you need to get started with Wasm-on-the-server!

Alex Crichton, Fermyon

Does a wonderful job describing the current ecosystem in practical examples.

David Pech, Wrike

The one place to grok WebAssembly!

Ralph Squillace, Microsoft

Comprehensive and in-depth.

Bailey Hayes, Cosmonic
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choose your plan

team

monthly
annual
$49.99
$399.99
only $33.33 per month
  • five seats for your team
  • access to all Manning books, MEAPs, liveVideos, liveProjects, and audiobooks!
  • choose another free product every time you renew
  • choose twelve free products per year
  • exclusive 50% discount on all purchases
  • renews monthly, pause or cancel renewal anytime
  • renews annually, pause or cancel renewal anytime
  • Server-Side WebAssembly ebook for free