Principal Software Engineer - Embedded (Onsite)

RTX; Plano (TX); On-site; USD 118,000 - 225,000; Full time

Benefits offered by this job

Relocation offered

Health and dental benefits

401(k) match

Job summary

RTX in Plano, TX is seeking a Principal Embedded Software Engineer to architect, design, and implement embedded real‑time software that integrates firmware, hardware, and software across complex systems. You will lead small teams, collaborate with cross-functional groups, and help drive testable, high‑quality solutions.

The role requires a STEM degree with 8+ years of experience in embedded real‑time development (C++) and experience with Linux or VxWorks, plus TS/SCI clearance.

Qualifications

• Bachelor’s degree in STEM and at least 8 years of engineering experience.
• Embedded real-time software development with C++.
• Experience with Linux, VxWorks, or RTOS.
• Minimum 2 years SAP experience and TS/SCI clearance before start.

Responsibilities

• Architect, design, implement, test, and debug embedded real-time software.
• Lead software development for teams of 3–4 engineers.
• Collaborate with cross-discipline teams to refine product concepts and improve testability and quality.
• Teach, coach, and mentor less experienced staff to enhance team capabilities.
• Contribute to proposals, preliminary design reviews, and critical design reviews.
• Participate in integration and testing of embedded real-time software with hardware.

Skills

Embedded real-time software

C++

Linux/VxWorks

Leadership

Education

Bachelor’s in STEM

Tools

Git

GitLab

Artifactory

Job description

Date Posted: 2026-10-23 Country: United States of America Location: US-TX-PLANO-465 ~ 465 Independence Pkwy ~ INDEPENDENCE Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Security Clearance Type: TS/SCI - Current Security Clearance Status: Active and existing security clearance required on day 1

At RTX, the worlds 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. Raytheon brings the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today’s mission and stay ahead of tomorrow’s threat. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

The Software organization develops the applications that drive missiles, launchers, radars, naval systems, fire control and other complex systems, as well as the integration and test software. These applications integrate firmware, operating systems, device drivers, networking, and control software to bring together sensor, guidance, and flight control capabilities to complete the mission. The Software org is made up of several Centers located across the country, responsible for all aspects of the software development lifecycle. Our 4000+ software engineers design, develop, and build innovative solutions for our customers. Join our fast-paced agile teams on the leading edge of technology. As a Principal Embedded Software Engineer, you will play a key role in architecting, designing, and implementing embedded real‑time software solutions for complex systems that integrate hardware, firmware, and software.

What You Will Do

• Architect, design, implement, test, and debug integrated embedded real‑time software within heterogeneous systems composed of firmware and hardware.
• Lead software development efforts for teams of 3 to 4 engineers.
• Collaborate with cross-discipline teams to define, refine, and improve product concepts, implementation, testability, and measurable quality.
• Teach, coach, and mentor less experienced staff to enhance team capabilities.
• Contribute to proposals, preliminary design reviews, and critical design reviews.
• Participate in the integration and testing of embedded real‑time software applications written in C++ or closely related software languages.
• Work with real-time operating systems such as Linux or VxWorks.
• Engage in occasional business-related travel as required, up to 10%.
• This job is onsite in Plano, TX; local residency or relocation required.

Qualifications You Must Have

• Typically requires a Bachelor’s in Science, Technology, Engineering, or Mathematics (STEM preferred) and a minimum of 8 years of prior engineering experience.
• Experience with embedded real‑time software development, including developing, testing, and integrating real‑time software applications written in C++ or closely related software languages.
• Development on Linux, VxWorks, or other Real-Time Operating Systems (RTOS).
• Integrating hardware, firmware, and software in complex systems.
• Minimum of 2 years of prior Special Access Program (SAP) experience or similar classified program experience.
• Active and transferable Top Secret with SCI U.S. government issued security clearance is required prior to start date with the ability to obtain Special Program Access after start.

Qualifications We Prefer

• Demonstrated leadership experience, formal or informal, such as mentoring junior engineers, coordinating small technical initiatives, facilitating team collaboration, driving engineering best practices, and/or guiding peers toward successful delivery.
• Experience working in lab environments with physical hardware, such as test benches or simulators.
• Ability to quickly understand and navigate complex systems and established code bases.
• Experience with product development utilizing Scrum techniques within the Agile software development process.
• Experience with DevSecOps pipeline implementation and use, including static code analysis, automated build, and automated test techniques using continuous integration/continuous delivery with a test‑driven development approach.
• Hands‑on experience with Git for version control and GitLab or Artifactory for repository management.

What We Offer

• Relocation Offered Based On Eligibility
• Salary range for this role is 118,300 USD - 224,900 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX anticipates the application window closing approximately 40 days from the date the notice was posted.
• Medical, dental, vision, life insurance, short‑term disability, long‑term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, Employee Scholar Program, parental leave, paid time off, and holidays.
• Annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective‑bargaining agreement.
• Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company’s performance.

Onsite

Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products.

Location Information

This position is onsite at our campus in beautiful Plano, TX. https://careers.rtx.com/global/en/raytheon-north-texas-location

Clearance Information

This position requires a security clearance. DCSA Consolidated Adjudication Services (DCSA CAS), an agency of the Department of Defense, handles and adjudicates the security clearance process. More information about Security Clearances can be found on the US Department of State government website here: https://www.state.gov/m/ds/clearances/c10978.htm.

We Are RTX

RTX is an aerospace and defense company that provides advanced systems and services for commercial, military and government customers worldwide. It comprises three industry‑leading businesses – Collins Aerospace, Pratt & Whitney, and Raytheon. Its 195,000 employees enable the company to operate at the edge of known science as they imagine and deliver solutions that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity. The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses, is headquartered in Arlington, Virginia.

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, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act.

This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply.