I applied online. The process took 2 weeks. I interviewed at Bloomberg (London, England) in Feb 2009
Interview
The interview process consisted of several rounds: 1 online test, 1 phone interview, 2 interviews on-site. Most questions were difficult to say the least. The online test measured your C/C++ skills. The phone interview was OK. The onsite interviews were difficult, especially the final one with the head of R&D and HR.