I applied through an employee referral. The process took 1 week. I interviewed at Logos Sprachinstitut (Berlin) in Jan 2017
Interview
The interview was a two stage process that involved two phonecalls. Both of the phonecalles were over skype and they were easily done. Only voice no video. It was calm, they asked questions and I answered. I would say learn german beforehand.
Interview questions [1]
Question 1
What is the difference between past simple and present perfect