I met them at the Guild des developpeurs, their studio is in the same building so from time to time they meet up with people there. We had a really good connection so I didn't need to pass an interview. A 1 week 3d test then followed up. It's a really small studio so there is probably little chance of openings, check up their facebook page for news. Or just go to the Guilde, meeting people there making networking is very useful, and you might see them by doing this.