I applied online. I interviewed at Metaswitch in Jul 2017
Interview
After some online tests, got invited to an interview day at their offices in London. The day involved an introduction session where they described what they did, multiple choice logic test (like an IQ test), then couple of longer tasks involving fastest travel routes and a blackjack machine. After these longer tasks, I had to discuss them with interviewers (apparently you might be interviewed once or twice), as well as usual interview questions
Interview questions [1]
Question 1
Given your proposed Blackjack machine, how could it be improved