From the process below, I got to step 3 before being unfortunately rejected:
1. HR interview (30')
2. Technical test (take home over a few days)
3. Technical interview (60')
4. Chat with the Head of People (30') and the Head of Department (30')
I found the technical test interesting (crypto, web sockets) & I enjoyed it. The technical interview had a positive mood. We discussed my experience, my code for the technical test and the team (tech and mission).
I was later rejected as they needed "a more senior profile".