Sr. Software Developer/Analyst applicants have rated the interview process at Slack with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 41% positive. This is according to Glassdoor user ratings.
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I applied through a recruiter. I interviewed at Slack
Interview
This was a great experience at it is mostly similar to what we usually have to do in our regular development job. I did not have to take much preparation. Taking a good System Design Course might help answer the questions during the interview. And also knowing and following good coding practices might help.
Interview questions [1]
Question 1
various system design problems, basic coding problems like how would you implement a certain feature in a toy project etc.