Applied online. A couple weeks later, I get an email to do an OA. OA was half coding challenge (Leetcode style) and half work style assessment. A couple weeks later, I received an email to provide availability for a final round of interviews the following week. The final round was 3 1 hour interviews with some SDE II's. Mostly behavioral and OOP design questions and one Leetcode style challenge. Got my offer letter 4 days later.
All of the interviewers were super nice and seemed excited to be there. Don't get too nervous, just be yourself and keep the conversation going.
Prep: For the Coding sections, if you know OOP principles and you can do the Leetcode blind 75, you're good. Write down a bunch of events from past employment, school, etc. to use for the behavioral questions.