The process consists of three stages. First stage was an hr interview, Hr was a very kind and helpful. Second stage was a codility test stage I passed this stage too. It contains 3 average java algorithm questions. The final stage was divided into two. First is online coding second is system design. I solved online algorithm too. But interviewers were so rude and they had already made their decision. About system design the greek guys were also so rude I designed system with alternative ways but they didn't listen to me one guy asked me same question 4 times and he said answer is correct. After interview, he said I did over engineering but it was an alternative way. I am very happy to not working in N26. people are so rude and they don't want knowledgeable colleagues. I don't know why they're scared but I didn't lose anything and I'm so glad I'm not working at N26

The project involved Java algorithms, using core Java and core object principles.