I bought a 386 motherboard that needed a patch. Not software, but by soldering a wire between two pads. You just basically figure it out and went from there with a soldering iron.

Build the computer from parts? Sure. Soldered it like it came as discrete components? Also sure.

Tech savvy is often in context of when you were learning in your teens to early twenties and then what of that skill set is still applicable today.

Desktops: Linux (Mint)
Laptops: Linux (Mint)
Phones: Linux (Android)
Servers: Linux (Debian)
SBC: Linux (Armbian / Raspberry Pi OS)
ESP32/ESP8266: Arduino (I’ve never really taken to MicroPython)
ATMega 328P/etc : Arduino

I had to scroll way too far down for this one, but it was the first one I thought of.

Another one would be Gary Indiana