1. Recruiter reached out; she was friendly and helpful. Had a great conversation. 2. Take-home challenge - took about a week (~15h). I actually thought the challenge was pretty fun, relevant, and creative. Specs were detailed and the team was responsive when I had questions. I didn't receive any feedback about my code, but they let me know that I passed very quickly. 3. Call with the hiring manager - this is where things went downhill. The hiring manager was cold, dismissive, and even laughed at my questions about team dynamics and culture fit. Since the recruiter did not have a specific team/manager in mind for me when I started the process, I wonder if the manager I spoke with was interested in my background in the first place. If Slack didn't pride itself on having an "empathetic" culture, I wouldn't bother writing a review - but my experience with Slack was one of the worst out of all the companies I interviewed with (a mix of big and mid-size). Perhaps it was just a bad fit with that hiring manager, but I would've preferred to find out that I'm not a good fit before spending ~15h of my own time on a take-home assignment.

The worst interview experience I ever had. The recruiter reached out to me for this position and after recruiter call, I had one Hiring manager call and I had to follow up couple of days later and was responded in a minute about next steps i.e. Take home Code Review. The take home assignment is a complete waste of your time, they allow you 24 hours and even if you followed all good code review practices, you have no idea about the interviewer is expecting. Then comes the most frustrating part, until this time the recruiter was very responsive and providing detailed answers for queries but after this round, no response even after I had followed up twice. I was ghosted without even a result. At least in normal interviews you can get a sense of whether interviewer was happy with you. Giving take home test and wasting 3-4 hours on their buggy code is useless.