I agree with all the comments about titles, get rid of them and reconsider it when you get to series A. As for what they would expect from you: don't focus on

I agree with all the comments about titles, get rid of them and reconsider it when you get to series A. As for what they would expect from you: don't focus on what's possible or hard technically. Only think about the outcome and the value created, then figure your shit out and build it. They will also expect you to be involved in business and sales strategy, don't be passive and simply observe under the umbrella of "I'm doing tech only".