Pros
There are so many pros. The Work -- There's a lot of amazing activity that's happening at Slack. I've been inspired by the creative projects that are being undertaken. I feel like the organization values my contribution. It is as close to a true meritocracy as I've had in my career. The Product -- it's a fabulous product with depth of capability that many people don't see yet. The product value is the reason I joined. The People and Culture -- The value that is shared over and over again is empathy. There's a rigorous hiring process and I can see why. Everyone I've met across Slack has a huge amount of compassion for each other and understanding. Team meetings are honest but kind. I'm continually amazed by the level of connection between people. Work Life Balance - You may think that being inside Slack, you're available 24-7. It's quit the opposite. They truly live the mantra "Work Hard and Go Home". Everyone contributes and then respects that people's evenings and weekends are their own time. Snoozing notifications on Slack is the norm and I've never felt pressure to work unreasonable hours. The Perks -- Where else can you get a weekly massage, all-day snacks, and kombucha on tap? :)
Cons
Infrastructure Debt - Slack's one of those places that both amazes and astounds. I'm sometimes surprised by the lack of infrastructure inside the company. The leadership team are aware of it, and the systems are in the process of being built... it just sometimes doesn't keep up with the speed of the growth. Product-centric - It's a fairly typical company whose origins are centered in product. We're in the phase of moving beyond feature release/adoption, and need to understand true customer value. This is something that most product companies will go through as they grow, and Slack is no exception. Sometimes the product won't "sell itself" as some people believe.