[ozzythecat]

What programming languages do others at your company know? Who will support this application in the future? Who would take over if you left the company?

I would work backwards from that and not necessarily whatever language is the most popular or highly voted response on HN or any other site.

You mentioned you’re going to hire additional devs. Are there other applications those devs would also work on or support? What are those applications written in? What type of development does this company normally do, I.e. consider their problem domain. If there’s a lot of ML work, for example, you could try to unify around Python. If they already have lots of JVM stuff, maybe Kotlin, Java, or even Scala make more sense.