Ab Initio interview questions

I found the lack of transparency with the process to be troubling - never knew what stage I was in. People were very nice throughout the stages of the interview however.

I was contacted by a recruiter and set up time with her to chat. Afterwards, I had a phone screen with an engineer. After passing the screen, I had a final onsite loop, consisting of a technical and behavioral interview, as well as a demo of their product. I was told feedback was very positive and I was asked to have a final conversation with the university talent head where he grilled me on my previous work. Got a rejection a couple days later without any explanation. Overall, every engineer I talked to was incredibly nice and friendly, but I was frustrated with how long the interview process took and the lack of communication throughout. It was a draining process and the unfriendly recruiter soured the experience for me.