It's even hard to blockchain developers and how are you looking for free ones? The only deal I can see here is to have friends who share your idea and are happy to work on it to unleash their skills/potential.
Doesn't your university offer investment of valuable startups? This way they can hire people for you, otherwise I highly doubt anyone will work for you for free.
unfortunately, my university doesn't offer that ! i'm looking for people to work with me not for me ! they will have the same privilege i'll have