Slack Staff Software Engineer reviews

4.0

70% would recommend to a friend

(16 total reviews)
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Stewart Butterfield

87% approve of CEO

98% positive business outlook

Staff Software Engineer employees have rated Slack with 4.0 out of 5 stars, based on 16 company reviews on Glassdoor. This indicates that most Staff Software Engineer professionals have a good working experience there. Slack is rated in line with the average (within 1 standard deviation) by Staff Software Engineer professionals compared to other employers within the Information Technology industry (3.6 stars).

Reviews by job title

16 reviews
5.0
Aug 11, 2025

Great company!

Recommend
CEO approval
Business Outlook

Pros

Great benefits, flexible work/life schedule and opportunities to innovate. I work on a very collaborative team and have a great manager.

Cons

Priorities can change, so don't be married to any one idea or project. Slack is constantly testing things that never ship in the spirit of making sure what ends up in customer's hands is the right choice. Leveling up is hard - their criteria is quite intense compared to other companies.

2.0
Mar 27, 2025
Recommend
CEO approval
Business Outlook

Pros

easy to get things done on monolithic architecture good direct teammates

Cons

no RSU refreshers that come anywhere close to the initial grant, don't expect to stay here longer than 4 years. very stagnant for your software engineering career, there aren't any interesting engineering problems to solve (which yeah, is a testament to how well slack's architecture works) 0 growth opportunity team handed off to 4 different managers in as many months salesforce influenced culture becoming very toxic

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Glassdoor has 1,230 Slack reviews submitted anonymously by Slack employees. Read employee reviews and ratings on Glassdoor to decide if Slack is right for you.