I applied through a staffing agency. The process took 4 weeks. I interviewed at Catalysis (UK) (London, England) in Nov 2017
Interview
CEO asks if you're "political" because the office must be "politics-free". Panel overall was quite nice, and everyone was friendly. There were some background experience questions but no drilling was involved. Overall process was light and easy.
Interview questions [1]
Question 1
Q: Please write a white paper on Artificial Intelligence.