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THE slack coding INTERVIEW

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Take a deep dive through the Slack interview process and learn all about what to expect in this comprehensive insider guide to the Slack interview process.


Explore some of the most commonly asked Slack questions and get detailed solutions. Get a leg up on your competition in the interview!


what are people saying about working at slack?

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  • Love the people, love the work, love the passion for product quality.

  • It feels like there's a lot of opportunity to take on responsibility and make meaningful contributions.

  • Slack is a company filled with hard-working, caring, and hilarious people that are committed to doing great work.

  • The codebase also has some poorly documented / poorly tested areas which are difficult to understand and make changes to.

  • Sometimes work load can be overwhelming.

  • The legacy codebase can be hard to work in sometimes, but it's getting better.

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"We’d like to get an idea of how you write code in the real world, since we feel this is the best indicator of how you’d write code day to day here at Slack. Granted, the Slack codebase is larger and more complicated than any technical exercise, but we have found the technical exercise to be a good indicator of future performance on the job. There are great engineers at big name companies and at small ones, so this gives everyone a chance to shine independent of where they are now."

"We cannot emphasize enough that the coding exercise is the most important way for us to evaluate your technical skills. If you’re selected to come in for an onsite interview, a portion of that interview will be devoted to discussing this exercise, including the choices and tradeoffs you made."

what slack employees have to say about interviewing

*All quotes obtained from Slack



 What you can expect in the slack interview

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“I applied once through the website and again at a conference. I received a coding challenge about a month after submitting my resume at the conference (~2 months after first application). Had an interview with a recruiter over the phone about a week later. Great conversation. I later had a Zoom call about 2 weeks later with an engineer who asked me questions about my background with iOS development, previous internships and projects. Received a phone call with an offer a week later.”




*All quotes obtained from Glassdoor





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Need help preparing for the interview?

Check out the Definitive Interview Prep Roadmap,

written and reviewed by real hiring managers.

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