[jen20]

One only need look at the job postings for Apple to see quite how common Java backend is there.

[butterlesstoast]

Checks out https://jobs.apple.com/en-us/search?search=java&sort=relevan...

[shrikant]

Yeah I can see that, even when a recruiter contacted me a few years back for a data engineering position, they were looking strictly for experience in JVM-based languages.