It depends on a lot of factors. Building a highly concurrent application such as chat? You may find node or elixir to be good fits. Building a reports service w

It depends on a lot of factors. Building a highly concurrent application such as chat? You may find node or elixir to be good fits. Building a reports service with lots of data crunching? Maybe checkout Python for it’s data libraries like Pandas / numpy. The choice of language stems from the domain you’re solving and what your team knows. Finding a happy middle ground is best, but sometimes you need to prefer either what the team already knows for the sake of time to market and other times you need to prioritize the problem space if the team’s knowledge has a limitation that will prevent it from being a maintainable solution.