Webtrekk Lead Javascript Engineer interview questions

Orientation Phone call, had about 1hr phone call where interviewer introduced company and its activities. followed by challenge code task, this was annoying part, they asked to create a simple app with specific framework, also required you write unit testing for such task. This task took a bit of time to complete, and hence they don't provide a constructive feedback on assignment it was really a waste of time. 2 technical interviews skype calls, one was asking basic tec questions, took around 20min, and other with backend senior engineer that i spent 40mins of interesting chat. Very reasonable interviewers