I applied online. The process took 2 days. I interviewed at FELFEL (Zürich) in Dec 2018
Interview
There is a phone interview to get to know the CEO and the position. Then a technical interview. Then a home exercise that can take several hours in exchange of some cash if not passed.
After that you will have to do a 1.5 days onsite interviews, where 3 of them are technical interviews and around 5 other interviews with people of other departments.
Interview questions [1]
Question 1
Typical algorithmic questions such as arrays and trees related, a bit of code design.
A pair programming session.
Maybe not much related to architecture design.