Airbnb Software Developer interview questions

Hackerrank coding challenge was all I got to do. Was approached by a recruiter after applying online through email with a hackerrank challange. It was one hour long and I was given a week to complete it

Recruiter screen followed by 2 phone interviews. They have one of the worst and biased interview process out there. Even after solving the questions on both the interviews and providing optimal solutions, still got rejected. Both the interviewers started with the questions without any introductions and hung up right at 45 min (didn't even let me ask any questions). I hope they fix their interviewing process and train their engineers on how to take interviews.