[aikah]

> My company's product backend is written in PHP

If it's a pure API (no HTML templating involved) I would use Go today. I personally find nodejs async programming obnoxious. Go isn't perfect (the type system is extremely limited, though It can be cheesed through reflection) but you have access to powerful concurrent constructs without having to write callbacks, promises and all that bullshit. Async programming is fine when it comes to GUI programming (it makes sense to write click event handlers). Having to perform an HTTP request in the backend asynchronously does not. Gimme threads,queues and pools and let me think synchronously.

Now if your backend is about serving some HTML files and forms, keep using PHP,there is very little reason to rewrite it in another language, that's where PHP shines.