Very flexible - just need to cross over at least 2 hours of the timezone, can work remote whenever
Very flexible. Fully remote is supported
Work can be fully remote or in office. My team was extremely flexible around personal commitments. There are of course some weekly meetings like 1/1s or team catch ups that aren't flexible). As an international organisation, if you are collaborating with teams/team members based in other time zones you may need to be flexible about taking meetings before/after typical 9-5 hours. Work is also assessed on output so your 'active' hours aren't monitored as your performance is what is important at Atlassian.