No, Hilti uses Amazon Web Services data centres in Ireland and Microsoft Azure data centres in the Netherlands.
If you want to know what is Unite Developer Hub is, please check: What is the Unite Developer Hub
If you want to know what Unite is, please check: What is ON!Track Unite
If you are interested in knowing where you can find technical details about ON!Track Unite, please check: Where can I find technical details about ON!Track Unite?
If you want to know how to connect ON!Track Unite with other software, please check: How to Link ON!Track with External Systems and What to Do If Yours Isn’t Supported