Only did first stage with two senior employees on the engineering team. They were very nice but we're also looking for very specific answers to the technical questions in particular.

I was contacted by the company's tech recruiter - Chelsea, and I liked the mission the company has and decided to proceeded with the interviews, which were 4 stages. All of the people interviewing me were understanding and very nice and I got feedback no later than the next day. The recruiter would contact me if there was any delay whatsoever and also take any feedback from me to make the process as smooth as possible.