The point truth is this…
You need to learn more about startup eco-system.
There is no one way approach to building a startup, as you are going to meet different situation which you or others haven’t met before, but your resilience and knowledge of the terrain is what will keep you moving.
Secondly, building a startup of such will actively require a tech person in the team, either as your Co-founder or CTO because he will need to oversee the engineering and technical aspects, including hiring the right person with the right skill if needed.
So Yes, you will need him as a Co-founder.
Draft a papper agreement and both party should sign it with an agreement on what roles and share individual will be parting with.
More also learn up alot about startup eco-system…I can’t stress this enough.
If you have some edge, consulting a startup legal entity will save you from half of the stress.
To you success, remain great.