Let his aspirations decide the language. Nobody ever got fired for learning C. Python is a great start for ML, JavaScript for the internet. Anything else is a p

Let his aspirations decide the language. Nobody ever got fired for learning C. Python is a great start for ML, JavaScript for the internet. Anything else is a plus. He is lucky to be in Seattle; the only requirement is putting the time in and knowing what you want to achieve. The money will follow.