I applied online. The process took 2 days. I interviewed at Virtu USA (Garden Grove, CA) in June 2015
Interview
Easy, nice, this is before many changes happened there so there was a fair system of management in place. The interview process, from what I can tell, has remained the same; easy and quick, they seem to pre-decide on people just by meeting them. Good luck if you're not Asian though...that is they're preferred race to hire.