I received an offer to be interviewed last year. The first stage was an online test. It was consisted from different tasks: sql task, java streams, algorithmic task, and task like find mistakes in the block of code and fix. About 3 hours for all. I didn’t finish all tasks. I received an email with a feedback, the sql task was done perfect but other task not. So, I didn’t go further.

I applied as a java developer (graduate program). There were 5-6 rounds which consumed a lot of time (If you pass one round, then you'll be moved forward). HR screen > introductory session with one senior dev (introduce yourself, why you're interested in Adyen) > Hackkerank > Code review with one tech lead and one senior > so on.. I failed at code review, they asked a lot of deep question to determine whether you really understand java.