I applied directly by sending my CV to one of the managers as I was told by a contact that they were looking to expand their group. There were some emails exchanged and then I was invited for a 2h on-site interview. I met the supervisors of two groups that were interested in my profile. Both supervisors were interested in hiring me, so I could choose in the end. I also met some of my future colleagues, making it 6 people in total.