I received a referral from a friend at Slack. It took them almost a month to get the process started.

The first step was a call with a recruiter. They asked about my experience and why I wanted to work with Slack. The recruiter repeatedly asked why I wanted to join Slack.

The next round was with the hiring manager. I felt like I was talking with a robot. I was told it would be a casual talk about my experience; instead, I received STAR-based questions, which threw me off. She frequently interrupted me and wouldn't let me finish my sentences. I also got a system design question.

Design a recommendation system for people you want to chat with when you enter '@' in the chat box of the Slack app.