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Great place to work

Senior Software Engineer
Current Employee
Has worked at Slack for 2 years
October 27, 2025
Denver, CO
5.0
RecommendsPositive OutlookNo CEO Opinion
Pros

Slack has been a really unique experience. Slack is owned by Salesforce, but has not been entirely integrated into the corporate experience (though we trend closer to integration every month). The developer experience has been strongly employee driven, and the engineers are very passionate about maintaining what makes Slack great.

The codebase is primarily Hacklang, which is an interesting PHP variant. I really hated it at first, but after having worked with it for some time, I find it relatively easy to write and follow. When you start, everyone is very understanding that it takes 6+ months to really get a full grasp on the language and our codebase.

Using AI is encouraged, but not explicitly required like at some tech shops. Coding LLMs are not necessarily great at Hacklang, but the more recent models have been getting better.

Cons

Creeping corporatization. Huge, hundreds-to-thousands-of-employee meetings where absolutely nothing of any import is said. Massive priority shifts recently as the Agentforce bet flopped, and a revitalized push into agents.

Advice to Management

Let Slack cook. This is the most impressive, self-motivated, and talented group of engineers and product specialists that I've worked with in my career. I understand that integrating with Salesforce is a necessary evil at this point, but the pendulum swings of priorities are massively slowing down our velocity.

Additional Ratings

Work/Life Balance
5.0
Culture and Values
5.0
Diversity, Equity, and Inclusion
4.0
Career Opportunities
4.0
Compensation and Benefits
4.0
Senior Management
3.0

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