Here's an example: https://boards.greenhouse.io/kespryinc/jobs/50151
Robotics as a field is quite large. There's all sorts of Robotics out there really.
JavaScript probably isn't the language of choice for Robotics though... C/C++ most definitely are a lot more widely used considering you want low latency with hard time limit control loops. Imagine if your robotics software suddenly decided it needed to garbage collect or JIT some code when it should've been making a decision to avoid collisions...
I notice that the first thing that pops up on google for 'programming drones' is http://www.nodecopter.com/ which seems right up my alley, but I think you have a good point about learning C/C++
It's a javascript framework for robotics.
I'd then implement it on a physical system - I'd focus on something other than Arduino, which doesn't translate well, and do it on RaspPi or similar.
I'm also wondering where people interested in this stuff gather, and where some of the better tutorials / blogs / books are.
You're right though, I need to just start putting parts together.