Hello everyone, I actually thought the whole time I had already written an article about this. Then I realized that although I’ve already mentioned ArchUnit a few times, but I haven’t written anything about it, except in my Obsidian Vault. So I’ll catch up on that today.

The fallacy of “scalability from day 1”

Imagine you are starting a new project. The team is motivated, the whiteboard has been wiped clean, and the first question in the room is: “Which microservices do we need?”

The year is 2025. Spring Boot 4 is here, and we no longer use deprecated RestTemplate calls. We combine the new Declarative HTTP Client feature with the proven Circuit Breaker Pattern and refine it with a Retry strategy.