They send a take home test to be done 4 hours after you receive it. Personally I do not appreciate this time-sensitive modality, since we are people and mostly currently employed, they cannot assume you can clear 4 hours for some recruitment process of a company you barely know. Recruiter used Whatsapp and emails to schedule interviews. They suddenly set meetings for the next day, and you have to contact them to change them. On one occasion, they sent two invitations on the same day a few hours apart. I missed the second email and joined a technical interview that did not happen, not until I realized there was a new invitation without notice. I later joined the coding round but it was actually the technical round. Red flags on communication and their treatment towards your own time management. Coding round was fun and interactive, I used Xcode, sharing my screen. You have to make an app oriented on unit tests. 45 minutes is a little tight. Technical and behavioural round was also quite good. They do not go deep into the stack asking specific Googleable questions. We discussed technology, my experience, and I was asked to "describe an algorithm that would collect duplicated files". It was up for me to interrogate the interviewer on details and ask about context. I was asked about time and space complexity, make sure to be fresh on your computer science.