The process started with an initial 30 minutes screen interview with an N26 recruiter who asked about my professional experience and why I'd like to join the company.

1. 1 hour coding challenge on HackerRank (6 questions + 1 coding task), which was pretty challenging given the time constraint.
2. 4 days take at home project, where they ask you to build an application given certain requirements.
3. 1 hour and 30 minutes technical interview with the iOS team, discussing the actual implementation of your project and questions related to the project and to your daily work as a developer.
4. 30 minutes interview with an engineering manager.
5. 5 minutes wrap up call with the N26 recruiter.

All the interviews were handled professionally. I had to wait a little for the final decision since all the interviewers had to meet together, other than that it was a very respectful interview process.

How do you keep up to date with what's going on in the iOS world?

If you're starting a new project, how would you decide if you should use a third party dependency or not?

If you were starting a new project now, which architectural pattern would you choose?

Tell me about your experience in writing unit tests.

Have you ever maintained a legacy project in Obj-C? Did you have any problems?

Did you any change to work with continuous integration and continuous delivery?

Who do you mostly collaborate with? Are there other iOS engineers, Android engineers, designers, etc...

What's the hardest part about communicating with people from other disciplines (e.g. people who are not engineers)?

Why bundler?

Architectural patterns used in the project explanation

Project implementation related questions.

Give us an example of something you've implemented in your daily work after reading something interesting in the iOS communities online.

When making a group project, how do you make sure that everyone is on the right path?

How would you like to develop here as an engineer?

In terms of team structure, how is your daily work organised?