As someone who works specifically recruiting for Startups and i have worked with some pretty fast growing ones the main challenges any of these startups is helping recruiting "passive candidates". What i mean by passive candidates is someone who is not actively looking for a job.

I believe a platform will come that does cut out the middleman and i am actually working on a few ideas but the harsh reality good companies want the best talent and that talent isn't always looking for a job.

Referral apps are a great way to attack the problem but i do not believe will be the only angle.

Michael