I have spent many years dreaming about building my own cloud platform. After several attempts within different companies, I finally launched my own project, Cozystack. In this article, I am going to share our experience and our approach to building a modern infrastructure platform around Kubernetes and its API. I’ll dive into the “platform approach” — what platform is, how it works, who it’s for, and how to get one off the ground. Plus, I’ll compare different architectures, explain why we went with K8s, and show you how we put together a production-grade solution based on it.
After reading this series, you will be able to build your own robust and modern solution — whether you adopt my patterns, use them as a reference, or reject them altogether. Regardless, it will be easier than building a platform from scratch; and it is always insightful to look into the inner workings of other projects and understand their underlying logic. Cozystack is always growing and changing, so what I’m describing here is where we stand as of Fall 2025. We’ve already moved away from some of our early architectural choices (we’re actually overhauling the platform’s “engine” right now; I’ll give an update on that once 1.0 is out).
