Ask HN: How to find the right startup to join

My problem, I don’t fall into a neat little box. Been doing it on my own for a few years but have been thinking about joining a team for quite some time. Started a company recently from a side project, did all the design and programming work myself but it failed to gain traction. Going to turn it back into a side project and find a startup in NYC or SF to join. Have been self-employed in the few years since grad school, previously started a consumer electronics / design company and have helped launch web startups in healthcare, apparel, and adolescent products.

Can program (rails, php, iOS, embedded, design work), build just about any physical product, manage operations, have a couple engineering degrees and an MBA. At first glance I wouldn’t think I’d have a hard time but my background and experience doesn’t conform to the standard ‘job description’. Looking specifically for a young startup, my thoughts were that at the start I can help with development/design. Then move into a more specialized role as the company grows. Would a startup want or need someone with that flexibility and experience? While I’ve only talked with a couple, they seem to be wary of the breadth of my background. How should I sell myself?

Any thoughts? Is my logic flawed?