> the service we were building was a fairly straightforward CRUD app. The expected load on this service was going to be on the order no more than a few queries per second, max, through the lifetime of this particular system. The service was a frontend to a fairly elaborate data-processing pipeline that could take many hours to run, so the service itself was not expected to be a performance bottleneck. There was no particular concern that a conventional language like Python would have any trouble delivering good performance.

Yeah, that's not the kind of thing you use low level stuff for. Ruby on Rails or Node or Elixir, or whatever Java thing is going to let you iterate faster than a lower level language.