I applied through college or university. I interviewed at Metaswitch (Edinburgh, Scotland) in Apr 2020
Interview
First it was some typical psychometic test problems, math problems. And then there were this blackjack problem, you need to write a program for it. After that, a senior engineer will review the answers and discuss results with you. It was moderately hard, but the people are really nice.
Interview questions [1]
Question 1
Using pseudo code to write a program for a blackjack game.