Principal Software Engineer- Resilient Networking; Onsite

Responsibilities

As a Principal Software Engineer you will lead the design, development, and integration of advanced resilient networking software systems and architectures on small, high‑impact teams.

• Lead and mentor small multidisciplinary engineering teams (4–6 members) on program technical aspects, including design, build, test, and demonstration.
• Architect and drive execution across the full software lifecycle—concept, modeling, implementation, integration, field demo, and program transition.
• Frame problems and translate mission needs into testable technical objectives.
• Design and run experiments; analyze results to iterate on concepts and implementations.
• Capture architectures, designs, test results, and lessons learned for reuse.
• Evaluate networking technologies such as MANET protocols, secure routing techniques, and adaptive mesh architectures.
• Contribute to proposals, white papers, and technical briefings.
• Travel up to 15% of the time.

• Minimum 8 years of relevant experience (or 5 years with an advanced degree) in Science, Technology, Engineering, or Mathematics (STEM).
• U.S. citizenship required; ability to obtain and maintain a U.S. government‑issued security clearance is required.
• At least 5 years of embedded software development (C, C++, Rust, Python, Bash).
• Proficiency with modern build systems (Make, CMake, SCons) and version control tools (Git, SVN) in complex or real‑time embedded environments.
• Background in embedded Linux systems, networked applications, networking stack implementation, or BSP development.
• Strong understanding of modern networking technologies including IPv4/IPv6, routing protocols, multicast, NAT, TCP/UDP, OLSR, OSPF, PIM, IPSec, VPN, QoS, and ACLs.
• Experience defining system‑level requirements and creating scalable software architectures.
• Experience with MANETs, Tactical Data Links, or distributed network systems.

• Advanced degree (Master’s or Ph.D.) in Computer Engineering, Electrical Engineering, Computer Science, or related discipline.
• Active DoD security clearance (Secret or above).
• Strong experience in networking stack implementation, embedded Linux, or board support packages.
• Experience integrating embedded software with FPGA/firmware systems.
• Understanding of RF concepts, waveform interactions, and cross‑layer impacts on networking performance.
• Experience working with DARPA, ONR, AFRL, or other DoD research organizations.
• Experience writing proposals and responding to BAAs, RFIs, or RFPs.
• Experience transitioning technology from R&D (TRL 3–6) into product.
• Excellent communication skills and ability to convey complex concepts to stakeholders.

• Medical, dental, and vision insurance
• Three weeks of vacation for newly hired employees
• Generous 401(k) plan with employer matching and lifetime income strategy option
• Tuition reimbursement program
• Student loan repayment program
• Life and disability coverage; optional pet, home, and auto insurance and additional coverage
• Birth, adoption, and parental leave benefits
• Health incentives and wellness rewards program
• Virtual doctor visits and telehealth services
• Child and elder care services
• Additional benefit programs such as group legal,  protection, and more

Salary range: $107,500 – $204,500 USD. Salary is based on experience, location, and function.

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, veteran status, or any other protected class. RTX provides affirmative action for qualified individuals with a disability and protected veterans in compliance with federal law.