Principal Software Engineer - Test with Security Clearance

Are you ready to architect the future of aerospace and defense technology? RTX is seeking a visionary Principal Software Engineer to join our elite team in Tucson, Arizona, where your technical mastery will directly impact national security and mission-critical systems. In this high-impact role, you will lead the design, development, and rigorous testing of complex software solutions, ensuring our platforms operate with unmatched precision and reliability. We aren’t just looking for a coder; we are looking for a technical leader who thrives in a collaborative, onsite environment and is eager to solve the most challenging problems facing our industry today.

This is a unique opportunity to leverage your expertise within a world-class organization that values innovation, integrity, and the pursuit of excellence. As a Principal Software Engineer, you will serve as a key subject matter expert, guiding technical strategy and mentoring the next generation of engineering talent. Because of the sensitive nature of our work, this position requires an active and transferable U.S. government-issued Secret security clearance. If you are a U.S. citizen passionate about pushing the boundaries of what is possible in the technology sector and want to build a career that truly makes a difference, we invite you to join our mission at RTX.

Requirements

• Proficiency in at least one modern programming language (Python, JS, Java, etc.).
• Understanding of software development life cycles and version control (Git).
• Strong problem-solving skills and attention to technical detail.
• Familiarity with cloud platforms (AWS, Azure, or Google Cloud) is a plus.
• Ability to work in an agile, fast-paced environment.
• Degree in Computer Science or equivalent practical experience.