[evilstark]

not sure how specific you are about "interesting work in hardware" but this is the first thing that came to mind for me:

https://www.span.io/

total rethink of the humble electric panel.

If this had been around when I solared up my house I would have definitely done it.... A little hard to see doing it on it's own...

[masonic]

Their Careers page has no positions and no contact links.

[therealcamino]

OP didn't say they were looking for a job. Just asked about interesting hardware.