Principal Software Engineer - Tactical Communications; Onsite

About the Company

At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world‑class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world.

Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense. At Collins Aerospace, we don’t just build technology—we engineer mission success. Our Communication Systems teams are on the front lines of innovation, designing and delivering cutting‑edge embedded communication solutions that keep military forces around the world safe, connected, and informed—no matter the environment.

We’re looking for a Principal Software Engineer who’s ready to make an impact. In this role, you won’t just write code—you’ll help shape the future of secure communications. From software‑defined radios and advanced networking to state‑of‑the‑art cryptographic systems and open system platform software, your work will drive critical real‑time communications that enable pilots and soldiers to securely share voice, video, and data when it matters most.

Here, you’ll collaborate with top‑tier engineers and industry experts, leveraging advanced technologies to push the boundaries of what’s possible. Whether you’re building trusted systems or breaking ground on new innovations, your contributions will directly support mission‑critical operations across the globe. If you’re passionate about solving complex challenges, excited by the idea of working on systems that truly matter and driven to grow alongside some of the brightest minds in the field—we want you on our team.

• Design and develop cutting‑edge embedded software, networking and communication products in C/C++ and Rust.
• Drive project success by planning and directly contributing to requirements, implementation, test development, and certification.
• Develop innovative tools and automated testing infrastructures that support Continuous Integration and Continuous Development processes.
• Mentor and guide software developers on technical and process challenges.
• Lead large initiatives and organize tasks for team members, ensuring timely delivery.
• Impact our business and our customers: supporting cost, schedule, and technical performance.

• Gain technical leadership experience and mentorship opportunities to develop talent for yourself and others.
• Collaborate with fellow subject matter experts and industry specialists, obtaining hands‑on experience with new and innovative technologies.
• Engage with a multidisciplinary team to develop a cross‑functional skillset.
• Grow into a subject matter expert on your projects and programs.

• Experience in leading efforts across the full software development lifecycle.
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
• Experience with software for communications or similar products.
• Experience with embedded software development.
• Experience with Python, C/C++, and/or Rust.
• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 8 years prior relevant experience or an Advanced Degree in a related field and minimum 5 years of experience.

• Active U.S. Department of Defense Clearance.
• Proficient with Linux development environments.
• Proficient with Git and other version control systems.
• Knowledgeable in networking and communications protocols.
• Experience with Rust programming language.
• Experience with multithreading and containerization.
• Experience with communications systems or software‑defined radios.
• Experience developing open systems architecture and…