I applied online. The process took 4+ weeks. I interviewed at CeleraOne (Berlin (Germany)) in March 2018.
I went through all the stages of the process.
1. A challenge. I did it fine and it was relevant.
2. Two Skype technical interviews. One of them was missed because the interviewer "forgot" the interview schedule.
3. Onsite interview, one by one with everyone there. This round is very unnecessarily cumbersome where I had to talk with the whole department including some juniors who did not know much about what to say, and there were many duplicated questions from different people.
I waited for two weeks before the company got back to be asking if I would like to work for them, and discussing visa and procedures. I interpreted this as a job offer but I was wrong. They turned completely silent after that. Even when I pushed them hard, they always said they need more time to decide.
There have been many negative feedbacks about this company's interview process, so I can confirm them. Don't go with them. They don't respect their candidates.
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