[spiffytech]

This is definitely possible.

I've very rarely had after-hours meetings because work was handled by colocated teammates, or the company only had one office. If chatting with another timezone was needed at all, it was async, or US cross-coast calls in the morning during business hours.

On-call is harder to avoid. It's hard to escape being chained to the pager, but even so the actual time spend responding to pages should be low. And I've had a number of jobs that didn't come with pager rotation at all.

My on call pages mostly looked like "get paged to reboot this thing. 15 minutes 1-3x / week."

With a single notable exception, my jobs have kept the majority or entirety of their work inside 9-6.