My application was submitted by referral, and I was contacted by a recruiter after a couple of days. We delved into my work history and why I want to work at Slack. Then I had a phone call with my would be manager. I was fast-tracked to catch up with other candidates and immediately brought in for an off-site. There were no trick questions. Just figure out how your experience aligns with the role and how you fit the Slack ethos.