Disclamer: I like python a lot, and loathes using java for .. well anything :) I think for a new service using a fluid language (I like to call Python for putt

Disclamer: I like python a lot, and loathes using java for .. well anything :) I think for a new service using a fluid language (I like to call Python for putty-clay) is probably a good idea, unless you are ensured a massive scale from the start. Much more project die due to not reaching their goals (i.e. dev time is too much or the devs got them selves painted into a corner) than scale at the beginning. So for the first production-prototype I would also strongly consider python. I don't know go enough to compare them, and also, it strongly depends on what you do. If you service is bottle-necked by the databases (which is common in those that I do), it really does not matter that much... Context is everything in making those decisions... Also, as a personal comment (not meant as an insult), please also appreciate that your "will eventually become a problem for the entire team" is also just a person opinion on your part... Nobody knows (or can know) for sure, you could be the one on the wrong here...