Slack reviews

4.0

77% would recommend to a friend

(1,095 total reviews)
avatar

Stewart Butterfield

88% approve of CEO

70% positive business outlook

Slack has an employee rating of 4.0 out of 5 stars, based on 1,095 company reviews on Glassdoor which indicates that most employees have a good working experience there. The Slack employee rating is in line with the average (within 1 standard deviation) for employers within the Tecnologías de la información industry (3.9 stars).

Reviews by job title

1K reviews
1.0
Feb 12, 2020
Recommend
CEO approval
Business Outlook

Pros

Great benefits, swanky office, cool baristas

Cons

This review pertains only to the Data Engineering team within Slack. I am a former member of the DE team who recently quit. I highly advise any prospective candidates to rethink if they want to apply here. The engineering culture and technical caliber here is appalling. Weekly, sometimes daily, outages are the norm. Dev and prod don't match at all, and testing on production data is routine and encouraged by management. On-call is dreaded for the poor engineering soul each week. And firefighting isn't limited to the on-call engineer either, as multiple team members are almost always pulled into incidents. Postmortem meetings are held at a regular cadence (usually at least two per week). The only reason Slack's customers don't experience any of this is because when DE outages happen, they only affect the other internal teams. Almost every aspect of engineers' tools work against them, but management doesn't seem to care. The code base is likewise a mess to behold. An experienced engineer knows that poor tools and poor code means that mistakes are very easy to make, which leads to further problems that compound. As an engineer here, you will be blamed for decreased productivity by leadership, despite the tools and infrastructure being the things that slow you down. On the topic of leadership, DE leadership is visionless and doesn't prioritize permanent fixes or true debt cleanup, but instead encourages technical mediocrity and cowboy coding by rewarding short-term "wins" over long-term stability. Promotions also follow this rule. (Hey, immediate results can be attributed to single people; long-term fallout is distributed across the team and is "blameless.") Several other engineers have quit over the past few months, and I'm sure more will in the future. Join Slack Data Engineering if you want to experience how a mosaic of engineering anti-patterns looks like in practice. P.S. Check out some of the other reviews for Slack DE on Glassdoor, and you'll see a similar sentiment repeated by others.

5.0
Feb 10, 2020

Amazing company

Recommend
CEO approval
Business Outlook

Pros

Great benefits and compensations Really thorough on-boarding program Lots of opportunities

Cons

No cons to note yet

2.0
Feb 4, 2020
Recommend
CEO approval
Business Outlook

Pros

Nice offices, coffee bars.. and that's about it!

Cons

The culture at Slack has changed dramatically post IPO. Some teams have seen change of leadership which has lead to a ruckus internally. The new leadership chose to completely disregard the previous leadership's decisions. People questioning each other's work, escalating things in bad spirit, bringing each other down has unfortunately become very common. It's very hard for an employee to focus on actual work.

Viewing 838 - 840 of 1,095 Reviews

Glassdoor has 1,227 Slack reviews submitted anonymously by Slack employees. Read employee reviews and ratings on Glassdoor to decide if Slack is right for you.