I am fortunate enough to be in a position where I DO the hiring. If I am unlucky enough to have to interview a fatty, I make sure to do a very long and detailed interview. I spend literally this entire time thinking about how I can justify hiring one of the people sized people I also interviewed over you if any sort of fat discrimination is ever brought up.  I don't care what sort of qualifications you have, being fat means you aren't going to be working for me.