I applied online. The process took 1 week. I interviewed at Brainlabs (London, England) in Sep 2016
Interview
Quite a relaxed interview, spoke to employees who were very friendly and other applicants who were applying for various things. Overall difficulty not too bad, just some questions about CV, Hobbies etc. Coding experience not required. Seemed like a really nice place to work, would highly recommend applying there anyway.
Interview questions [1]
Question 1
Python test (allowed to google, not too difficult) and brainteaser