First round was a case interview and final round was a behavioral interview with a more senior member of the team. Each interview was 45 minutes with one member from the team.
Difficult interview
Application
I interviewed at IBM
Interview
Behavioral focused interview with an emphasis on past reactions to events, very few technical questions. Come prepared to answer basic stock questions and don't be shy to answer questions outside of your comfort zone.
There was only 1 round of interview. Heard from recruiter 1 month after submitted application. Interview was 1 hour and did not seem structured at all; it went over a mix of technical and behavioral topics.
First stage of CV application, followed by an in-person assessment centre, then final interview with hiring manager in person in Southbank London office. Many assessment centres were running throughout 2017 when i applied.