The process took one month (due to interviewers availability during these times) but in itself it was short.
1 phone/chime video technical interview (1hr)
1 chime video face to face with 7 people (5hrs total + 1h break)
The phone was a regular technical Frontend interview. Learn your native javascript, web optimization, security, SEO, CSS. Fire frontend tech questions (about 8 - 10 no coding) one leadership principles question (tell me a time when) and 1 coding (glassdoor saved me on this one so solve tech exercises on glassdoor)
Face to face. For 30min at least in each round I was asked 2-3 "tell me a time when" leadership principles questions. A lot of talking. one of the round was purely behavioral only leadership principles and some. Learn the STAR response structure watch videos on youtube, remember all the projects you worked on and what you did and what happened and you'll be prepared for those. You will receive all those details from your recruiter anyways. Then for 30min, one coding question. I haven't studied on leetcode for this interview but if I have to guess it'll probably be an easy leetcode question with frontend variations. So study your datastructure and DOM manipulation. javascript.info is cool.
I hope this helps