We started with two languages on our microservice backend. It is definitely an up-front investment. But it pays off in several ways: - our service infrastructu

We started with two languages on our microservice backend. It is definitely an up-front investment. But it pays off in several ways: - our service infrastructure is really language-agnostic. - our design discussions are on an abstraction level above the language level. (of course there are language-specific implementation strategy discussions, too.) - while it is a bit harder to find suitable developers, I think we attract a very valuable subset: people who are not tied to their favourite language, and don't shy away from learning new things.