I applied through other source. I interviewed at DataArt (Woronesch, ) in Jul 2017
Interview
Three steps: English interview via Skype, interview with HR, technical interview. English interview was very difficult. I thought my level was better. Then for the technical interview you'd better to review everything you know. Some questions can be pretty deep and difficult.
Interview questions [1]
Question 1
Best practices to implement caching in large Web Apps