The process:
started with a phone interview: short conversation about my previous experience and a programming challenge on CodePair. The problem was fairly easy but the focus was on complexity, explanation of data structure choice and testing. Two days later, I got an invitation for an onsite interview, which was scheduled for two weeks later.
On-site interview:
Because I study outside UK, Bloomberg has offered me both plane tickets and accommodation.
There, I had 3 interviews : one technical, one design architecture and one behavioural. The technical one was similar to the phone interview, with 2 CodePair tasks this time and two interviewers. During the design interview, which I had the following day, I was asked to design classes, interfaces and methods I would use to design an app for which i got a description (written on a paper). The behavioral interview was an extended discussion on my previous experiences, the way I would improve myself and what is the impact I believe I could have on the company.
All the interviewers were very professional and have created a comfortable and secure environment I could showcase my skills in.