I'm just a beginner. I write in hardware description languages for test benches, simulations, checkers and constrained random tests. I've also done PCB layout (hobbyist to RF microstrip), GUI programming (I don't enjoy that), and using IC design software for.simulation and layout. I also spend a lot of time working with hardware. The debugging process is very challenging, and certain aspects of it can be tedious. Overall I find it to be satisfying, challging work. I also get to apply my Linux knowledge most of the time when working on things, which is great.