Hamburg is 9 hours ahead of Portland
Best overlap: 8:00 AM to 9:00 AM in Portland is 5:00 PM to 6:00 PM in Hamburg.
Portland and Hamburg overlap from 8:00 AM to 9:00 AM (Portland) to the equivalent 5:00 PM to 6:00 PM in Hamburg — that's your meeting window. You've got roughly 1 hour — enough for a focused daily check-in if you hold it at 8:00 AM in Portland (5:00 PM in Hamburg).