So this means that if in the future I apply for Ycombinator and the application is accepted, I won't be able to participate because of the visa issues.
[Edit: removed stuff about the Schengen area]
Jobs aside, I've loved the last two years I've spent here in Ireland. The people are lovely, as is the country itself. Still on the expensive side, but we're having price corrections along with the recession. :-)
Edit: I couldn't reply so Ill explain here. OPT is Optional Practical Training, it is what F1 visa holders(full time students) can do. We are able to stay for 29 months after graduation, to work in the field we studied for in order to get practical training.
EDIT: Section 7.2.1 specifically.
Careful there. It's almost certainly not. Unless you're just a "brain" doing meetings only, you'd almost certainly be doing something that could be considered "work" and it doesn't matter if you're not being paid.
From my understanding you could do it, because foreigners are allowed to own or start U.S. corporations. I'm not sure how much work on the project you would have to do at home versus here, though.
Have you considered applying for a "study abroad" program in the US? If you get accepted, then you will be able to work limited hours on-campus (and potentially off-campus as part of your studies).
Without legal permission to work in the U.S., you will find it extraordinarily difficult to find reputable employment.
I would counsel against illegal employment -- when I was young and stupid I worked on a cash basis for a man who "didn't want none of that OSHA paperwork nonsense", and I was forced to quit the job after he threw a 20 lb. pipe at my head. (Cleaning oil pipeline components with a toothbrush is, by the way, every bit as fun as it sounds.)