I applied through a recruiter. The process took 3 months. I interviewed at Bridgewater Associates (Westport, CT) in Sep 2014
Interview
This was a long and thorough interview process. It took many months. The company is really looking for a match with its culture of continuous improvement and self-actualization. Being successful here requires the ability to internalize ongoing feedback and behave in accordance with a strict code of conduct. For instance, gossip will get you in very hot water at Bridgewater.