Talked to 2 people who worked there. Only 1 interview cycle, with two back-to-back interviews on the same day. Both interviewers asked fairly difficult, in-depth questions that went beyond surface-level experience and really tested how you think. A mix of behavioral and situational questions, with some pressure to explain your reasoning clearly.
After the written application which was just a resume and some typical questions, there were two interviews in a row with people on the team. They were online back to back.
I applied through university. I interviewed at Mattel (El Segundo, CA)
Interview
It was a simple process, mostly behavioral questions. Very straightforward and fast turn around time. They were very communicative about the process and timelines regarding decisions. I did not get any technical questions in my interview.