A job where you don't get penalised for having to stay home with a sick child, either by having to use annual leave or take unpaid leave. A job where you can leave earlier or start later at a short notice and be able to work up the lost hours another time. A job that would allow you to work from home regularly and/or often and/or at short notice. A company or a work environment that doesn't resent you for having to miss workdays due to childcare issues. Where you're not overlooked for a promotion because you're a parent.
I've never worked for a company like that, neither have any of my friends as far as I know. Tbf, most problems would be solved if more companies allowed their staff to work from home more often or were more flexible with their hours.
I understand that there are jobs where flexibility is not an option but I think most jobs could be much more flexible than they are now.