[sbilstein]

Be nice but remember you have objective skills and you need to suss out the CEOs objective skills.

1) Can they raise money? Proof is good here. Sometimes someone will say "I want you as my co-founder to go and raise my seed round" and you can condition leaving your current job on getting at least some checks in. Remember, this founder _knows_ you can deliver the goods, you are an employed software engineer. Can they?

2) Can they recruit? The process might be a mess but are they treating your time and concerns with respect?

3) Do they view you as an equal partner? Make sure you nail down exactly what they want. If they want a true co-founder, ask for 50%. If they don't, make sure you understand what it means to be an employee to a non-technical founding team.