The interview process consisted of 3 rounds: an initial technical screen covering mechanical engineering fundamentals, a resume review with a senior engineer / team lead that does a deep dive into past experience, and a final onsite interview where you give technical presentations as well as multiple followup 1:1s with engineers on the team. The technical presentation is split into two halves, one in which you present on a personal project and another in which you present on a specific design project that Astranis provides. Across almost all of the interviews, they try to push you to your technical limit and understand where the edge of your knowledge lies. The takehome project is somewhat open ended and isn't necessarily supposed to be perfectly "solved" in one go, but rather is meant to bring out all the different aspects you consider in a design and how you compromise between various design requirements. The interviewers are kind and encouraging, and most of the process felt cooperative rather than you versus them. That being said, the bar at Astranis is high and the interview process was more demanding than most.