Bloomberg Software Engineer interview questions

Applied through employee referral and got a phone screen after two weeks. The process had four rounds: an initial coding round, then a loop with another coding round, system design, and HR. Each interview began with a 15-minute resume discussion and ended with time for me to ask questions. Positive email sent in 30 minutes after each interview to notify you of passing to the next interview. Interviewers were friendly, collaborative, and gave hints when needed. Communication and scheduling from HR were very smooth.