However, if you can prove strong or exceptional skill and achievement in whatever you have done tech related, I am sure it won't matter if you went to an elite school or not (and if it does, you probably won't like it there anyway).
For most businesses (startups in particular) that do not have the time or resources to filter candidates, an elite school is a general simple quality filter, but the world is full of examples of people who did not go to school let alone an elite school, from Richard Branson to Dyson to Jobs to the mass of not-so-famous.
Worry not, shine and hopefully you will be noticed.