It looks like you're not looking for someone who can scale and become a full fledged CTO (or you might not even need one), so try to look at it as a founding engineer hire instead.

With early founding engineers, you can sell them on things like:

- opportunity for learning
- understanding business practices and models
- opportunity for leadership down the road

And the equity structure should be something around 1-5% of the business vested over a few years. You'll have to sit down and explain it to them as some people either aren't educated or they want to be assured of exactly what they're being given.

I did this a few times last year and if done well, you can get some solid work out of them :)

Feel free to call me up and chat about it more.