The fact that the author even knows about radare let alone put quite a bit of effort into building a ui for it suggests that he's no stranger to lower level programming tho.

But the code is definitely slanted towards a C style, not C++, and they are very different languages. (He prefers C strings vs C++ strings, for example).

I haven't looked at his code, but why would he use either if he's using Qt? Qt has its own QString class that's far superior to C++'s native strings.