Melbourne is 3 hours ahead of Jakarta
Best overlap: 8:00 AM to 3:00 PM in Jakarta is 11:00 AM to 6:00 PM in Melbourne.
Shoot for 8:00 AM to 3:00 PM in Jakarta; your Melbourne colleagues will see that as 11:00 AM to 6:00 PM. Melbourne is 3 hours ahead of Jakarta, but you'd hardly notice — 7 hours of shared hours makes this feel like working in neighbouring time zones. Note that Melbourne follows daylight saving while Jakarta stays put, so the times above drift by an hour seasonally.