The worker model, pioneered by Cloudflare and others, provides a lightweight, secure way of running serverless workloads.

This talk introduces Wasm Workers Server, an open source serverless implementation of this model. It leverages the portability, performance and security features from WebAssembly (Wasm). We will show why and how we designed Wasm Workers Server (wws) to maximize compatibility with existing solutions.

Maintaining a balance between delivered features and compatibility is complex. Every platform wants to provide the latest features to unlock new capabilities. Supporting multiple languages is a big one, as developers' productivity relies heavily on reusing their knowledge.

We designed wws based on two principles: fitting existing developers' workflows and compatibility with other platforms. This framework enables you to develop and run serverless applications written in different programming languages from Rust and Go to JavaScript and Python.