>>I wonder if I’m hurting my chances of future employment by working so long on my own. You built a business, designed and built a product grounds up, you made

>>I wonder if I’m hurting my chances of future employment by working so long on my own. You built a business, designed and built a product grounds up, you made profits, you have users. You did this all alone. You are in the top 1% of the product/engineering managers out there. Believe me, those who do not hire you have more to lose. Any sensible company would want to hire a person like you.