I am a big fan of Go, but why not python or even ruby? Seems either python/ruby would be a better fit for this kind of project than node/php, and easier to hire

I am a big fan of Go, but why not python or even ruby? Seems either python/ruby would be a better fit for this kind of project than node/php, and easier to hire for than Go (since that was kind of alluded to as a requirement).