Their security engineer salaries weren't particularly competitive last I talked to them. They bump your base up by some fractional multiplier after 1.5 years but theres not much notable other than that.
http://www.practicecodinginterview.com/blog/2019/5/20/the-coding-interview
Palantir has been "about ready to IPO" and then floundering for like 8 years now fyi. Your stock might not be worth anything for another decade