One should hire people who care, and who continuously broaden their own horizons. When it comes to developers, these inevitably happen to also be polyglot programmers in my experience.
First sentence is correct. Second sentence, the jury is still out. Plenty polygots fail short in writing high quality idiomatic code due to focus in breadth not depth.
Writing web apps backed by db in Python, Java, and Ruby are considered as breadth repeated 3 times.
Writing web apps backed by db in Python, Java, and Ruby are considered as breadth repeated 3 times.