Good question :) SRE-written system are never or almost never written in Java. However many SRE teams support Java systems.
Literally nothing at Google except third-party code (like Linux kernel) is written in straight C. C++ is very common, though.
Python sucks and is useless. Most things that were written in python are now written with Go.
I guess your question is about what happens if a C++ expert ends up on a Java team, but I don't really know. I happen to have landed in C++ world, which suited me.
True in my area as well. The only new things being written in Python are things that need to interop with other systems that have giant existing Python libraries.
I was an SRE who was most comfortable in C++ who changed ladders to a SWE team who was primarily Java. To be honest it was harder to learn all the team specific stuff than pick up Java.
The reason Python tends to suck is not all really nice libraries are ported to it in any reasonable amount of time. (If you need it, you end up doing the work). Go sucks in new and totally different ways.
I'm imagine an SRE needs to be fluent in at least one statically types compiled language. Would Go fulfill that in terms of getting an interviewed or hired or does it need to be C/C++?
Literally nothing at Google except third-party code (like Linux kernel) is written in straight C. C++ is very common, though.
Python sucks and is useless. Most things that were written in python are now written with Go.
I guess your question is about what happens if a C++ expert ends up on a Java team, but I don't really know. I happen to have landed in C++ world, which suited me.