I applied online. I interviewed at Wunder Mobility (Hamburg) in Jan 2017
Interview
kind of informal taken by the HR. The talk was very relaxing. Nothing so deep technical. Better know what the company does and have a few words of motivation. Because it was an internship, they do not take you so seriously.
The hiring process started with a 30 mins video call. The recruiter first introduced about himself, his experience and the company...etc. Then he asked about my past experience. I had a second interview with another recruiter, and talked deeper according to my resume.