Tiny embedded things from people you've never heard of. Often, I won't even get to see the compiler for the platform, I'll just write the code, send it to a co

Tiny embedded things from people you've never heard of. Often, I won't even get to see the compiler for the platform, I'll just write the code, send it to a completely external person, and say "this should compile and run on your platform, I can help if it doesn't". The core of what I do is audio DSP, so it has to be memory/cycle efficient too, otherwise no one wants to use it. But as soon as you start developing for these platforms, you then need to build testing tools which also work there, and all the other fun stuff that goes along with it, so it ends up being a lot more than just the core DSP stuff (which is where most of the platform specific stuff comes for me actually, as the core DSP stuff is just memory in memory out type stuff with no side effects).