Software Security Engineer

The Software Security Engineer at Castelion builds and implements cryptographic foundations to secure flight systems, owning encryption, code signing, secure boot, and key management across embedded platforms. This role involves collaborating with embedded, avionics, and infrastructure engineers to integrate security directly into the full software and hardware stack from manufacturing through flight operations. The position requires translating cryptographic principles into practical, resilient implementations in constrained environments to ensure the integrity and authenticity of mission-critical systems.