The process took 2 weeks in total. I've first got a call from the director of the area here in London (CSG), after an internal referral from an ex-colleague. After this initial screening call, I went for a 1:1 meeting with the director, basically for him to share an overview of the role and for me to talk about my past and aspirations for the future. After that, I had another 3 interviews by phone: with a local manager, with a senior technical architect and with an internal recruiter from Germany. Finally (at the second week), I had to present a business case study for the director, the manager and the senior technical architect at the office -- basically, I was given a document with limited information about a hypothetical client, had 1h to study it and prepare a presentation, then 1h to present. During the presentation, the panel (simulating a real client) asked me typical questions about the recommended implementation approach. I have used PowerPoint to create a quick deck and some Xmind mind maps.