what i get is Palantir is mostly the USA's home-grown answer to SAP with an aerospace/defense slant, and since a lot of aerospace is ITAR export controlled, they get cloistered in the robe of government secrecy.

https://www.palantir.com/careers/

whole bunch of "strategists" and management types getting hired, and of course the usual truckloads of "backend" and "full-stack" engineers to make the wheels on the bus go round.