go and search in google, use the keyword, "NY room mates"
I must tell you, you will find nothing here, it's like if you are trying to find water in a desert.
and if you start asking these question before you go to the USA then i must tell you that you will be lost, No body ask for room+job, don't you want a car?? if you ask, then ask it BIG.
Do a plan before you go, know your abilities and look up for a job in monster.com for exemple there are lot of website where you can find jobs and manage your budget for your living in NY, it's not cheap state, it's expensive. Be smart and don't ask stupid question that may lead you crying while you are trying to find somewhere to sleep in new york