The cement footings on the pilings were finished a few days ago, and we rented an excavator to fill the soil back in. Here is a simple progression over the past 2 days:

The foundation on Nov 25.
Everything finished and ready to fill in.

The foundation on Nov 26.
Filling the soil back in.

The foundation on Nov 27.
The soil is filled in and only the rebar sticking out of the
cement footings are visible.