Pros
Everyone you work with is super smart. It does feel like the company cares about their people and even the global community, i.e. the company is run on 100% renewable energy, we get paid time off for volunteer work, charity donation matching up to (I think) $2500 per year. Something else that I'm impressed by is the progressive, open culture where people feel open to speak about issues other than the typical mind-numbing water cooler talk at a company-wide level (issues like loss, suicide, infertility, taking a break for mental illness, etc.). Paid therapy sessions. A budget of $500 per year for wellness. Time off gets automatically approved.
Cons
The worst thing about working at Atlassian is the cringey silicon valley humour that sometimes socks you in the mouth when there's a US-based meeting. Not quite "corporate" cringe, very much in a league of its own.