From a use case perspective, I'd put it in the Java camp. Can do low level, although probably not the best choice for really down-to-the-metal stuff (if you really need all the optimization you can get and don't want to deal with GC). Due to its pretty decent library support and compilation speed/build system, it's also a bit more suited to application where you might reach for a scripting language, as turnaround doesn't suffer too much. There's also a pretty strong concurrency support, using the CSP approach.

So no really narrow sweet spot. A good language for general network programming, which might include some framework web stuff, but also could involve writing your own custom servers and consumers.

There's probably a better language for each individual task, but go is quite solid at a wide spectrum of tasks. Good community, too, if a bit fanboyish.