I applied online. The process took 1 week. I interviewed at Slack (Pune) in Jul 2021
Interview
Interview process is quite different compare to others. I reached till round 3.
2 SQL statement and run those via code was a 3rd 1-1 coding round.
during 3rd round interviewer mic was not working so he was delay around 10 min, that time was not extended in entire process. interviewer was very confused about what to ask
I have to assume many thing during a interview.
I suggest better not to attempt this if you have strong background of tech stack and project. asking SQL in coding round is quite weird. I was under assumption that I have to solve some coding problem using data but it was completely SQL oriented so I don't like much.
Probably that may be very good evaluation process which I unable to digest :)
Round 1 -- HR connect on what projects we have worked and brief about the organization.
Round 2 - - Engineering Manager round on projects, work done. - System Design Question, asked me to design and api of employee name suggestion which can be used in chat using @ , and how to scale it.
Round 3 - - Connect to SQLite database and write queries using the db given and run those via code.
I applied online. The process took 4 weeks. I interviewed at Slack (Seattle, WA) in Aug 2025
Interview
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.
Interview questions [1]
Question 1
How would you debug if a service starts delaying responses suddenly.
I applied through an employee referral. The process took 3 weeks. I interviewed at Slack in Aug 2025
Interview
Long interview process. Recruiter screen, manager screen, code review take home (I spent 1.5 hours). Then a final loop with system design, coding (1.5 hours), and 2 behaviorals. The managers I talked to were great, but none of the engineers seemed engaged at all or like they wanted to be there. After the final loop (which I thought went well) I was ghosted by the recruiter, he didn't even respond after I followed up a couple times asking for status. It's unacceptable to not even get a generic rejection email considering all the time I put into this interview process. Complete waste of time.
Interview questions [1]
Question 1
Coding - download real codebase with a Slack-like chat app using Sqlite DB. Had a list of prompts to add a feature (private channels)
System design - Design system to injest commands/keywords given in Slack messages, call 3rd party APIs based on them
Behavioral - mostly standard questions, also asked some vague open ended technical questions like "how would you think about the API for user search suggestions in Slack"
I applied through a recruiter. The process took 4 weeks. I interviewed at Slack (Atlanta, GA) in Nov 2024
Interview
First Round: Recruiter Screening
Second Round: Chat with Staff Engineer
Third Round: Technical Challenge; build a mini-app
Fourth Round: 4 separate interviews with the team, 2 of which were system design