Initial phone call with HR. Second interview was with one engineer. This interview consisted of reviewing my experience as well as technical questions. Third interview was panel style with a coding assessment provided to me prior to the interview. They asked to explain my code and how I would modify it given various scenarios.

Initial 30 minute phone screening. Second interview was an hour going over my previous work experience and technical questions that consisted of OOP fundamentals, pointers & references, mutex locks, TCP vs UDP, virtual funcitons

Straight forward - 30 minutes phone screen with behavioral and technical questions on C++. Followed by 5 hour in-person or virtual interview which included both technical and behavioral questions. Each hour was a different interview with different people.