The art of writing tests is not straightforward, and writing good tests is even harder. Check out this post to learn how you can verify if your tests are doing what they are supposed to. And if you want to know what Ninja Turtles, X-Men and effective tests have in common.

This article describes in depth how we managed to replace one of the most critical components of our checkout experience, with zero downtime. It was a large-scale migration involving approximately 30 teams and 500 active users.

Chapter one. I hope to look back one day on an archive filled with my thoughts at various points in life, and this post is where it started. While the exact content of this blog is undecided to a large extent, my motivation is clear.