Viv Labs interview questions

Took more than 2 months. Phone Screen - Code Challenge - Onsite. Typical software engineer interview process. The recruiter was super helpful and kind. Code challenge took about 8 hours to complete. 4 sessions for onsite. Review for your code challenge - algorithm - architecture/system design - past projects/demo

I have been contacted by a recruiter for a position at Viv labs. After some talk and another call with a hiring manager, I had to make a code challenge at home. It was a simple game to do with React. After that, I had an onsite with 4 rounds. The first was a demo of the product and a talk with the director of engineers and a product manager. The second was a technical review of my code. The third a system design interview and the latest an algorithm round. Every round was simple for who know their work. I also had a talk after that with 2 others peoples. The recruiter and I were really optimists and I was expected an offer a few days after, and even if they told to the recruiter that everything was good after each call with each referral, they decide to stop there for a behavior reason after they talk to my referrals. I was really surprised by this decision since I had a good feeling with everybody and I was thinking that they also liked me.