Applied online and got a quick call from a recruiter - pretty standard. Next was screening with an engineer, which was around breaking down a problem and solution approach rather than deep diving into coding. More of a filtering round than a technical deep dive. Onsite had 3 back-to-back rounds. 1) coding - was straightforward but required clean code - ques on optimizing a scheduling system. 2) debugging - involved working with a broken API service - tracing logs, identifying bottlenecks, and fixing memory leaks. 3) ("learning" + system design) tested how quickly I could pick up a new concept, implement it, and then design a system with trade-offs - was given a new library and had to integrate it into an existing system within mins. sys design is standard - scaling, db choices, failure handling. Last one was with HM. a little tough but structured process. Prepped using LC, sys design resources, and a few mocks on Prepfully (had an ex-Palantir coach, which was super helpful). Also made sure to understand Palantir’s products and their use cases