The first interview in a series was good and I felt like I had a great rapport with the interviewer. Job sounded interesting. Next was a coding challenge and I didn't finish the 2nd part of some insane thing counting some pattern within an alphanumeric string. And that was the end because of the coding test. Companies that use that as a metric to drop someone from the interview process are just doing it wrong. Anyways, happy where I landed but I do love Slack the product.