I work mainly in embedded development and I'm not really sold on blockchain or IoT or, really, using TCP/IP for much of anything. My recent paid work involves control systems on small microcontrollers, either using FreeRTOS or that are so small they use no OS. I'm interested in building driver stacks on these chips for writing things like bootloaders and serial interfaces that support remote control commands.
I also have a little bit of PCB design experience, although I'm not trained as an EE. So, I have no idea if my skills might be of use, but I've been thinking of how to apply some of my work to future open-source hardware devices. I keep coming back to how some of this might be useful for fully open voting machines, and I know everyone jumps to thinking about blockchain for that, but I think it is overkill and too heavyweight for what I want to do. I'm thinking more of writing data to redundant EEPROMs and verifying it with something older and simpler like message digests or digital signatures.
I realize that maybe there's not a lot of overlap there but I guess if you need any low-level drivers I might be able to help...