There were first two telephone interviews for a pre-screening, with their HR department head, and with the hiring manager. Thereafter there was an invitation for a 3-5 hr interview session with several people at their company office.

4-step interview process. Initial screening, 2 hour email technical assessment, 1 hour phone technical assessment, 4 hour in-person technical assessment. Petty lengthy interview process but good practice. About 7 hours invested.

There was an email Interview filled with 6 questions. Each question had multiple sub questions. The questions varied from general data structure questions, algorithms, and object oriented general questions. I did not go further after the email question.