Initial CodeSignal assessment, followed by a "Power Day" which consisted of four 1-hour interviews:

• General coding interview
• Domain (iOS) specific interview
• Behavioral (STAR method) interview
• Case interview

You'll get a 1-hour break in the middle of the day, so the entire Power Day is about 5 hours.

The Power Day interview was a bit easier than expected, especially for a senior-level position. They claim that for legal reasons, they cannot give you feedback on your interviews.

• For the general coding assessment, they asked an easy/medium level data structures and algorithms question.

• For the domain interview, it was questions about how I would design an iOS app given certain requirements. I remember they asked me about what kind of storage solutions I would use for an iOS application given certain criteria. After explaining my answers, they would then add different requirements, and I would have to update my answers based on that.

• For the behavioral interview, they asked questions like, "Tell me about a time you disagreed with a coworker." They specifically told you to use the STAR method. This interview only lasted about 15 minutes.

• For the case interview, they showed me some code, asked me to explain what it was doing, and asked me to change the code to do some additional things as required. This one was probably the most difficult. Although from their description of it in the interview prep, it wasn't what I expected; they said you would be given a business problem and have to describe your solution for it. This interview was nothing like that at all. It was just another coding interview.