Many stages. I was referred by a fried from uni so may be different for you. Technical test had 3 leetcode style questions that were assessed for both correctness and efficiency with unknown data sets for input. Followed by a phone call interview with a hiring manager and another interview with a technical lead. I declined the third stage due to havig a better offer elsewhere but I gather there were 2 more stages after that. Another technical test and another interview with studio leads.