The whole process took about 5 weeks. HR approached me on Linkedin; first call with recruiter on the same day that lasted about 30 minutes; then a 30 min call with the hiring manager; then a 3 parts coding challenge that can took me about 2.5 hours; then 1 hour call with hiring manager and architect. Unfortunately, this was a complete waste of time. They moved me through the process each step of the way, with no negative feedback, but only a generic rejection email at the end. Do not waste your time like I did.