I applied online. I interviewed at Concentrix (Wrocław) in Aug 2017
Interview
It was pretty long (4 stages, which was the longest in my life but I didn't mind that, that means you really care about the quality of people you hire) but consistent. Didn't had to long for a long time for response, that was a plus.
Interview questions [1]
Question 1
Typical ones, about experience, technologies, some real life - programming ones. Some of the coding theory.