This and the following lines have so many opinions presented as truisms, it’s difficult to take the poster seriously.
2-4 “senior” devs were spending time on tech-only features without delivering actual end-user / business features. Ookay. Seems like a failure of engineering management, but let’s press forward.
2-4 engineers replaced with 1 “true Senior” engineer, who rewrote the microservices nightmare into a monolith powered by Spring. And he had C Suite backing for this. All’s well now.
I mean, that’s a great result. But it feels like there’s also some great people/motivation backstory we’re not getting. Also, maybe lessons from a one-person monolith don’t apply everywhere, even if that monolith serves millions of users?