Cap’n Proto with React and NestJS

In a recent project for a Mayflower client, we used Quarkus Java Microservices with Google Protobuf. In a very abstract sense, our objective was to exchange serialized binary data over a message bus system living in Kubernetes. Therefore I decided to replace the existing tech stack with Typescript, NestJS, and Cap’n Proto IDL (Interactive Data Language).

In this blog post, I will show you how to serialize data using Cap’n Proto in React and send it to a NestJS receiver, which simulates a backend.

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