I second saying that the title only matters if the person coming on board cares, though an Cxx title helps in discussions with other companies.
But what you DO need, unless all you are going to do is put up a website - is to have a technical advisor of some sort who's future incentives are tied to the success of your company (ie equity) rather than just a contracted salary
Flip it around: You are an Angel Investor.
Someone comes to you with your idea. And their management team is your two co-founders and no--one technical. Do YOU feel comfortable that such a team (based purely on the CVs involved) is likely to execute on the proposed idea?
Ok so then... do you need a technologist on board to make the team strong enough to pass the investor "trust/belief" test?