The missing icon I'd like to see is "the work is mostly or all open source". It's a significant differentiating factor. With so many companies using LLVM or GC

The missing icon I'd like to see is "the work is mostly or all open source". It's a significant differentiating factor. With so many companies using LLVM or GCC there probably are a few where the job's output is mostly or all open source by default, and there are certainly other compiler jobs where it isn't.