So I'm about to graduate with a degree in IT. I've sent out about 70 applications to various software engineering and full-stack development positions. I'm located in New York so there's no shortage of jobs here. Despite the fact that I'm a student, I technically have about four years of development experience already. I've spent the last three years trying to help save my family's previous company which inadvertently forced me into web development, providing me with several major skills. I'm legitimately the Cofounder and Director of IT at my family's latest business venture after we left our previous partnership.
My question is, with all of this experience, which I've noticed has put me miles ahead of my classmates, why is it that I can't seem to get an interview?
I would've thought working 20+ hours a week as a full-stack developer while still a student might be pretty attractive to these companies. I've already revised my resume about three times. I'm wondering if there's something else I'm doing wrong or if they're just seeing my graduation being so recent and assuming I know very little.
Update addressing some of the answers so far:
I've had my resume reviewed by my school's career services, Indeed Prime, and Hired.com. I've adjusted it according to their advice. I've applied to all types of companies in every industry from startups to major players like Google. I have been applying exclusively online as I currently don't have the time for networking. I try to apply to companies which ask for my specific skillset. The reason I describe myself that way is that I frequently find myself teaching my classmates new things like programming languages and industry technologies like Docker.