Bloomberg's application process is tightly integrated with LinkedIn, so if you have a LinkedIn profile then it's very easy to simply import your profile in.
The first step was a 30 minute long phone interview. This was primarily about basics of C++ programming. I'd highly recommend candidates to brush up on pointers, C++ STL container classes such as vectors and hash maps, memory management (e.g. why is malloc not used any more).
I got an email offering a face-to-face interview at their London office within two days. The guidance on this was that the interview would last "at least an hour, but please allow for up to three hours". I assume that the length of the interview depends on how far deserving of a candidate you are. The interview was conducted by a engineering team manager and a lead programmer on one of their teams. The first set of questions was solely about pointers and how they are referenced / dereferenced in situations; really fundamental stuff but if you're not clear then you're likely to trip up at some point. Like I did. I did manage to backtrack and walk them through my correct solution when they gave me a hint on one of the trickier ones but I knew by that point my interview was shot. They wrapped it up after exactly an hour.
The whole process was extremely quick, it seemed like everyone was on the ball.