Zalando Frontend Developer interview questions

I applied for this company, interview with developer was ok but at end I got message from HR that I'm not going forward with application. I asked to give me feedback what can I improve or what was wrong. They do not want to provide this info and just made me insult telling me they search for senior developer. And in that way telling me they do not consider me senior dev evan I have quite a lot of experience and on current job I'm Lead Senior Software Engineer.

It took three rounds of interviews, all of which have been very nice and professional. First interview is with the HR. A week later first technical interview is set. After passing that, a group of three technical interviews follows. That means the whole process takes three to four weeks. Of course, since the high number of candidates, it is possible you will be waiting a week or so before you get the invitation to the first interview.