Should I be concerned that water is pooling when ground is dug near the foundation?
Water isn't "forming" -- the hole is either catching rain, or the water table really is that high in that area. Dry surface doesn't necessarily mean dry underground, if there's a layer of stone or clay that's keeping it from easily soaking deeper, or if you happen to be in the path of drainage from farther up a hill.

For new construction I would hope that the builders were aware of local conditions and did something appropriate with the foundation. I presume that your builders are subject to the same kinds of inspections those in the US are, and here I don't think they're allowed to fill in the ground around the foundation until it has been approved.

I think your choices are either to trust that, or to hire someone to carefully excavate alongside the foundation, look at what was done, and tell you whether it's properly designed or not. 

Personally, unless you have reason to worry, I wouldn't.