It was long, they wanted a total of 7 (At the beginning they said that there were only 4) interviews + writing a paper about implementing a system design. The first one was with the recruiter, then 1 technical building an API, then another one for coding challenges, DS, and questions about ruby, the other one asked me the same as the first recruiter and told me that they expect another round of 3 interviews with their client, and in a Friday in the afternoon they ask me to write a paper about system design over the weekend, its when I quit the process.