Had an initial phone screen with the HR recruiter. Followed up with a phone interview with a manager and a member of the team. Took about an hour. Third step was a technical challenge that was extremely easy. The final step was a 3 hour interview here in Portland. First couple of sessions went very well and the last session got a bit odd as one of the interviewers started to get a bit confrontational over my preferred stack. It was odd. After the interview process I got completely ghosted and have had no one from the Portland or SF office return my emails. Very unprofessional and a complete waste of time. You at least owe possible candidates at least an email after spending close to two months for this process and then spending 3 hours in your office.