I applied online. The process took 2 months. I interviewed at Snap (London, England) in June 2017
Interview
2 phone screens followed by onsite.
Overall the interviewers are pretty supportive and test in depth knowledge of the subject.
The interviews involved whiteboard discussion, coding (compilation and testing) on laptop and lunch with the team.
Interview questions [1]
Question 1
Tested on Computer Vision Knowledge and discussion on past projects
Coding Questions similar to ones on Leetcode