Two phone screens with group manager & section manager followed by a technical presentation and panel interview. Phone screens were mostly just going through resume and answering questions about the company. The technical presentation was on a past project I've worked on, and the panel interviews were highly technical and involved in-depth systems engineering, EE, and coding questions. Much more difficult panel interviews than I expected, but they thoroughly vet their candidates.

Hiring Manager emailed, to schedule a 30 min call. Then they scheduled an online presentations (Covid time) with managers/senior members. This followed with one to one interviews over few next days. The HR person was very rude and was the most difficult and annoying part of the interview.