If you're willing to take some time to learn it, golang is quick to pickup for both C and C++ devs. Every C0 dev started as a C or C++ dev, with the exception of @ay-p What I can say about Javascript for someone with a C++/Java background is that the transition is much rougher, coming from C, C++ or golang. @ay-p and @jcv have experienced it, so they are better qualified to comment.