I applied through a recruiter. The process took 4 weeks. I interviewed at VASS (Barcelona)
Interview
Very positive. I got two interviews: HR one, after contacting me via phone, and the technical one with the department manager after some time. The timings were right, because I was working elsewhere at the moment, so they were non-intrusive and they acknowledged the situation by letting me set the timing. I couldn't possibly write anything bad about them, in this regard.
Interview questions [1]
Question 1
I was asked a couple of questions on how to solve load-balancing in highly concurrent systems but nothing out of the ordinary.