Pros
Challenging work, Most of the people there are at the top of their game. Atlassian looks after their employees with an unprecedented level of perks and freebies. No wonder they have won the #1 place to work three years running.
Cons
Still very much a siloed company made up of multiple teams competing for the founders' attention. Culture is not consistent across the company - one silo in particular is overly political and can be very toxic if you question what the silo leads are doing. Question or challenge the flip-flopping management within this silo and you will be pegged as having an "attitude" problem. Atlassian favours loud and/or opinionated alpha personalities and rewards/promotes as such. If you want to succeed at Atlassian, you must become known to the "right" people. Conclusion: Atlassian is a great place to work if you fit the mould.