I applied online. I interviewed at Slack in Jun 2017
Interview
They are quick to respond and give feedback. Overall, I feel like the recruiting team is great but I feel interviewing with this company is a waste of time. They are very vague about what they are looking for in candidate. The coding problem they give is very vague and they don't specify what exactly they are looking for. I have feeling that they have preselected candidate. I wasn't given any feedback as to why I was rejected. Or they probably want an ivy league candidate like all other Silicon Valley companies. I don't even know why they bothering wasting other people's time if you don't want to provide feedback or have a candidate in mind.
The process took 1 week. I interviewed at Slack in Jun 2017
Interview
I had a 30 min call with the HR. We discussed the company, role and my background. There were a couple of technical questions at the end. Following this I got a coding challenge. Didn't clear this round.