SpaceX is seeking a Senior Security Software Engineer to join their Starlink team, working on the world's largest satellite constellation providing fast, reliable internet to over 7M+ users worldwide. This role focuses on developing and implementing security infrastructure and features across Starlink's complex ecosystem of satellites, consumer receivers, and supporting software. The ideal candidate will have strong software engineering skills combined with deep security expertise, particularly in areas like applied cryptography, network security, and secure boot systems. You'll be working on cutting-edge technology that directly impacts global internet accessibility while contributing to SpaceX's broader mission of enabling human life on Mars. The position offers competitive compensation ($168,000-$230,000) and comprehensive benefits, including equity opportunities and medical coverage. This is a unique opportunity to work on security challenges at an interplanetary scale, making a real impact on both space technology and global internet infrastructure. The role requires a combination of technical expertise, creative problem-solving, and strong collaboration skills to work effectively across engineering teams.