This principal software engineering role supports the development of Open Mission Systems for next-generation military aircraft platforms within a mission-driven aerospace and defense team. The position focuses on designing and integrating safety-critical C++ software in Linux environments, utilizing middleware architectures like DDS and managing service contracts for avionics interoperability. Key responsibilities include leading software architecture, conducting mission-level simulation and integration testing, and collaborating with multi-site teams to ensure compliance with defense standards. The opportunity appeals to engineers seeking to impact national security through complex technical challenges in a collaborative culture. While the role requires 100% onsite presence at Fort Worth or Palmdale locations, the company offers robust benefits, career growth, and professional development resources.