Palantir has an outdated software stack (Java/Swing). Their genius lied in creating "mythical image" and cleverly overselling it to the less proficient government agencies (apparently NSA was smart enough to see through the ruse). And then in turn sell the "spooky/mysterious" image to bunch of naive Stanford/Berkeley undergrads and convince them to work for peanuts. Sadly in 2017, their tech stack is falling apart, t…
Also, there is nothing wrong with a Java/Swing backend. Its not cool, but any company handling that amount of sensitive data will not use a 'cool' stack.