Hello! I'm in recruiting @ Facebook. Unfortunately we don't hire a ton of people quite yet straight out of their MBA. I highly recommend looking into your MBA program's career center to see if they host any type of job fair so you can network & meet recruiters in person to make an impression. These entry-level roles are uber competitive and are highly sort after. If you can't get an opportunity right away at one of your dream tech companies, I would start by figuring out exactly WHAT you want to do, & considering doing that at a smaller company and then (once you have a few yrs of relevant work experience) transition to your dream tech company. That is what I did in recruiting & how I landed at Facebook.