I applied through a recruiter. The process took 2 weeks. I interviewed at UBS (London, England) in Sep 2015
Interview
Phone interview with a member of the team consisting of general software engineering and a couple of probability and statistics questions. This was followed by an on-site coding test - algorithms focused (trees, sorting, etc) then one to ones with the rest of the team. Questions varied from algorithm based to programming in a chosen programming langugage.
I applied through a staffing agency. The process took 1 day. I interviewed at UBS (Pune) in Feb 2018
Interview
Process took one long day, it consists of one online written test and 32 technical and one HR round. Questions were moderate level. Prepare well and ready for technical questions