Its worth restating Cointerra uses Open-silicon as chip designer. The CEO of open silicon is also on the board of cointerra, and likely an investor. Open silicon is not a small company, and should have plenty of engineers to chose from if for some reason cointerra wasnt happy with the team they got assigned.

Secondly, did you guys miss the title of that job opening ?

Hiring: Principal Verification Engineer for Next Gen ASIC