After getting invited to the interview, I first talked to someone from HR. The interview started with some default questions about my motivation to work at DTT, and I also got some more information about the company itself. This part took about 20 minutes.
Next, a web developer joined the conversation, and we talked about some details of my test. I got some feedback and I was asked to explain why I did certain things in a certain way. He also asked me some more questions to determine my skill level. This part took about 15 minutes.
Lastly, the CEO joined the conversation and, after some small talk, offered me a contract, and we talked about some more details. This part took about 10 minutes.