SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today SpaceX is actively developing the technologies to make this possible, with the ultimate goal ofenabling human life on Mars.SR. SECURITY SOFTWARE ENGINEER - TOP SECRET CLEARANCEAt SpaceX we're leveraging our experience in building rockets and spacecraft to deploy Starlink, the world's most advanced broadband internet system. Starlink is the world's largest satellite constellation and is providing fast, reliable internet to 2M+ users worldwide. We design, build, test, and operate all parts of the system - thousands of satellites, consumer receivers that allow users to connect within minutes of unboxing, and the software that brings it all together. We've only begun to scratch the surface of Starlink's potential global impact and are looking for best-in-class engineers to help maximize Starlink's utility for communities and businesses around the globe.As a Security Software Engineer you will influence the security of software across our product lines. We are looking for people with a track record of shipping reliable software and who have a broad understanding of the security design of today's Internet, including the cryptographic primitives involved. You see the big picture, prioritize accordingly, and are comfortable with working at different levels of abstraction. Ideally, you have notable skills in one or more of the following:Software engineeringApplied cryptographyNetwork securityOperating system securitySecure/Authenticated bootIncident response and adversary detectionVulnerability researchBeing flexible, communicating clearly, and establishing and maintaining productive working relationships with other engineering teams are paramount to success. If you are passionate about building quality products, love the challenges of outsmarting adversaries, and want to make an impact on an inter-planetary scale, then you will fit right in.RESPONSIBILITIES:Design and build security infrastructure for Starlink, including cryptographic services and other security-critical servicesDevelop security features for Starlink systems, including our router, dish, gateways, and satellitesDesign security into factory processes and provide network services in support of thisMaintain existing production systems and improve security posture via both direct implementation and recommendations to other teamsBuild prototypes and help identify, design, and test security improvementsFurther our mission of providing secure and reliable Internet to underserved communitiesBASIC QUALIFICATIONS:Bachelor's degree in computer science or another STEM discipline and 5+ years of professional experience in security software development; OR 7+ years of professional experience in security software development in lieu of a degreeExperience with one or more software development languages (i.e. Python, C++, Golang)Experience designing and implementing security solutions for operating systems, distributed systems, or other enterprise/large-scale infrastructureActive Top Secret, Top Secret SCI, or DOE Level Q clearancePREFERRED SKILLS AND EXPERIENCE:Experience contributing security improvements to complex systemsExperience working with special purpose security hardware such as Trusted Platform Modules (TPMs) and Hardware Security Modules (HSMs)Fundamental understanding of network protocols; including the TCP/IP stack as well as UDP based protocolsExperienced in navigating large, complex, interactive systemsFlexibility, communicating clearly, and establishing and maintaining productive working relationships with other engineering teamsExcellent communication skills, both written and verbalAbility to work both independently and in a team