Principal Software Engineer Embedded Cybersecurity- Active Secret- Active Secret; Onsite

Job Overview

Principal Software Engineer – Embedded Cryptographic Solutions (Onsite)

• Active and transferable DoD Secret clearance required prior to start date.
• U.S. citizenship mandatory; only U.S. citizens eligible for clearance.

• Design, develop, integrate, and verify secure embedded software for military communications products.
• Lead advanced cryptographic solution development in C++ or Rust, including device management, reprogramming, key management, and encryption algorithms.
• Architect scalable, multi‑threaded embedded codebases and drive architecture improvements.
• Collaborate with hardware, FPGA, and software teams to ensure seamless product integration.
• Define requirements, oversee implementation, drive test case development, and manage certification processes.
• Mentor developers, promote best practices, and cultivate a high‑performing engineering culture.
• Influence design to enhance security and reliability of critical communications systems.

• Degree in STEM field or Advanced Degree with minimum 8 years of relevant experience (or 5 years with an advanced degree).
• Embedded software development experience with C, C++, or Rust on complex, multi‑threaded systems.
• Proficiency in Python and embedded Linux.
• Experience with full‑lifecycle software development practices and configuration management tools.
• Strong problem‑solving skills and ability to deliver results on schedule.

• Experience in embedded security software development and integration.
• Comfortable with Linux development tools, mutexes, semaphores, queues, and inter‑process communication.
• Exposure to secure software and cryptographic algorithms.
• Proficient in scripting languages and networking protocols.
• Experience leading teams and managing projects through the full software lifecycle.
• Familiarity with Agile methodologies and process improvement.

• Competitive medical, dental, and vision insurance.
• Three weeks of vacation for new hires.
• Generous 401(k) plan with employer match and additional retirement contributions.
• Tuition reimbursement and student loan repayment programs.
• Life and disability insurance; optional additional coverages.
• Parental leave, adoption assistance, and fertility benefits.
• Wellness incentives, virtual health services, and counseling sessions.
• Relocation assistance and other employee programs.

$107,500 – $204,500 USD (based on experience).

RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, or veteran status. RTX provides affirmative action for qualified individuals with disabilities and protected veterans in compliance with Section
503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act.