I know bridges can be built out of metal or wood! I'll just hire an engineer and let them figure it out.
Which is great, because that's exactly what the engineer knows how to do. This should be the same case with the technical co-founder, if not, they're the wrong person to choose as your technical co-founder.
Anybody qualified to be CTO of a company should be able to asses the needs of the software, architect the solution, get up to speed on any technologies they're not yet familiar with, and implement the solution.
I know bridges can be built out of metal or wood! I'll just hire an engineer and let them figure it out.
Which is great, because that's exactly what the engineer knows how to do. This should be the same case with the technical co-founder, if not, they're the wrong person to choose as your technical co-founder.