The first step was a prescreen phone call with an external recruiter, then an interview with the hiring manager and a member of the team.
I should have trusted my instincts at the prescreen as I couldn't help feeling like I was being carelessly managed when it was time to schedule the next interview. That interview was an uncomfortable experience for me and I quickly got the sense that their requirements for the job differed from the job description I had responded to.
For what it's worth, the process moved fairly quickly.