I applied online from India. It had 5 rounds in all.

1. HR round : Basic questions to understand my motivation to move to Berlin and join N26.

2. Tech assignment : Spring Boot REST problem to be completed with clean code and unit-tests. I was given 4 days to complete this test.

3. Pair coding : Discussion about my assignment, current work project and finally an easy level HackerRank algorithmic problem. We discussed about its time and space complexity.

4. System design : Various scenarios about different parts of a fictional bank application and I was asked to come up with solution architecture (DB, caches, micro-services...). Even though I could not come up with optimal solutions, the interviewers appreciated my approach.

5. Behavioral : Usual stuff about challenging task completed, disagreement with peer/manager, strength etcetera

The whole interview took about 4 weeks and the recruitment partner was quick to share the updates.

We discussed DB load handling, micro-service performance degradation, and algorithmic questions.