BackendData/ML/AIAround since 2004
Scala
A JVM language blending object-oriented and functional programming, historically the primary language behind Apache Spark and much of the big-data ecosystem, though Python has taken over much of that ground.
Think of it like
Like a bilingual translator fluent in both the object-oriented and functional 'dialects' of programming, able to switch between them as a problem calls for it.
Junior or senior?
Junior sounds like
Can't say which context their Scala experience is actually in.
Senior sounds like
Can say clearly whether it was Spark/data engineering or a JVM backend service, and how functional their style was.
Ask them
“Was your Scala experience mainly around Spark/data engineering, or a JVM backend service — and how much of it leaned functional versus object-oriented style?”