[esaym]

Knowing more than one language is not very typical?

Unless you have been involved as a software dev for 20+ years, if you have on your resume that you know perl,javascript, python, and java...that normally just means you know them very poorly and can only work with them by cuttingand pasting code from google searches... This has just been my general experience (with myself actually...)

So, IMO, it is perfectly fine to target one language. If your entire stack is in python, why would you want to onboard a senior Java dev and then spend the next year training him how to use flask, sqlalchemy, django, jquery, ect? Each one of those takes a couple of months to get fluid at...

[superswordfish]

Yet there are people out there capable of learning more than one technology deeply in a short time, and you'd be doing yourself and your employer a disservice to write them off as charlatans.

[sametmax]

But how many are they ? And can you afford them ? And do you really need a unicorn for this simple job ?