my company does datacenter hardware. Most of it is actually open source.
here’s an rpi 4 cluster board:
here’s the kicad sources: https://github.com/aep/pislice
This thing needs an onboard ethernet switch, but high speed signals (10Gbe) are beyond my capabilities, so if you have the skills and instruments, and you are a freelancer, drop me a message or mail arvid at devguard.io
Also very happy to sponsor existing open source switches instead, if you can adapt it to our needs.
Lots of you are making amazing things, so if your open source thing fits into a datacenter, also let me know.