Never ever go there if really value your time. You can spent hours to do coding assignment and then in second round they can judge you in 10-15 mins how good you are ,didn't expect such hiring process from german company. First Round : Coding assignment Second : skype call with head of engineering.

The interview process was not hard. I had 2 interviews in the morning: 1. Interview with CTO (around 30 minutes) 2. Interview with Team Lead (around 1 hour) Then I got an offer in the evening.