[laureny]

Junior developers become CTO's of startups all the time, it's really not that remarkable, all you need to be is a co founder and since such teams are usually CEO and CTO, the roles are quite obvious.

The main mistakes that junior engineers make when they accept the role of CTO is to think it's a 100% technical job. It's not, especially when you have fewer than 30 employees.

The CTO title is pretty meaningless unless the company either has > 30 employees or has at least one successful product.