Aeternum, who are based downstairs from DoES and make air quality
sensors, are looking for someone who can do PCB design and some C/C++
firmware development.
I contract there Tuesdays and Thursdays on the firmware side, so it's
the electronics side that's more important. They're a small, but
friendly team of folk.
Full details at
https://aeternum.co/careers/
Cheers,
Adrian.