They were not very difficult, but they were thorough. After an initial screening, I had to go through a task assessment and then a personal interview. It lasted around three weeks.
Interview questions [1]
Question 1
Assessed interest, some relevant skills and overall inclination to learn.
One Interview with the Manager and another one with the Director. It's all about the initial interview, you need to provide information about your background and how you can bring value to the projects.