Principal Software Engineer

RTX; El Segundo (CA); On-site; USD 118,000 - 225,000; Full time

Benefits offered by this job

401(k) plan (4% match)

Flexible work schedules

Employee Scholar Program

Job summary

RTX in El Segundo, CA is seeking a senior software engineer to contribute to DoD-grade programs. You will participate in the full software lifecycle, from architecture and design to integration, testing, and field support, collaborating with a team of engineers to deliver mission-critical solutions.

Candidates must have STEM degree and 5+ years of software experience and be capable of working in a fast-paced defense environment requiring security clearances.

Qualifications

• Bachelor’s degree in Science, Technology, Engineering or Mathematics (STEM).
• 5 years of relevant software experience required.
• Experience in programming languages such as C++, Java, Python or similar.
• Experience using version control tools like Git.

Responsibilities

• Part of a software team or lead a small software team.
• Cover full lifecycle of product development from architecture and design to integration, test, and field support.

Skills

C++

Java

Python

SDLC experience

Git

Education

Bachelor’s degree (STEM)

Tools

Git

Linux

VxWorks/INTEGRITY/RTOS

Job description

Job Details

Date Posted: 2026-10-27

Country: United States of America

Location: US-CA-EL SEGUNDO-E01 ~ 2000 E El Segundo Blvd ~ BLDG E01

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: DoD Clearance: Secret

Security Clearance Status: Active and existing security clearance required on day 1

Company Overview

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.

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.

What You Will Do

As a member of the team, you will work with cutting-edge technology and contribute to programs that safeguard lives and uphold the freedoms we cherish. At Raytheon, our exceptional engineers are empowered to achieve excellence and inspired to innovate, all within an inclusive environment that values work-life balance as a core principle, not just a catchphrase.

• Responsible for some or all of a Software product, contributing as a software team member and possibly leading a small software team.
• Responsibilities spanning the full lifecycle of product development, from architecture and design, through integration, test, and field support.

Qualifications You Must Have

• Typically requires a Bachelor’s degree in Science, Technology, Engineering or Mathematics (STEM) and 5 years of relevant software experience.
• Experience in programming languages such as C++, Java, Python or similar.
• Experience across SDLC including software integration & testing, and debugging tools.
• Experience using version control tools like Git.
• Able to obtain and maintain a U.S. government issued security clearance as and when required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Qualifications We Prefer

• Proven self-motivated problem solver who can look at a situation, identify gaps or issues, and take initiative to resolve them (technically, with process, and with documentation)
• Excellent verbal and written communication skills.
• Ability to work collaboratively in a team environment.
• Proficiency with Object-Oriented Design (OOD) principles and practices.
• Proficiency with Agile lifecycle process including Scrum, Continuous Integration and Test-Driven Development Methodologies
• Experience developing on Red Hat Linux or equivalent OS
• Knowledge of DevSecOps practices, including CI/CD pipelines and secure software development methodologies
• Experience leveraging Generative AI and Machine Learning to improve productivity, collaboration, and performance
• Experience with gRPC and Protobufs
• Experience with Linux, VxWorks, INTEGRITY, or other RTOS
• Familiarity with Open Systems Architectures and modular design principles.
• Domain knowledge in one or more of the following areas: Radars, EO/IR, EW, Network Communications, Datalinks, Platform Integration, Weapons/Effects (Missiles, Projectiles), Command & Control for Fire Control and Surveillance applications, Multi-Domain Airborne Sensor Fusion and Tracking experience

Role Types

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.

Hybrid: Employees who are working in Hybrid roles will work regularly both onsite and offsite. Ratio of time working onsite will be determined in partnership with your leader.

Remote: Employees who are working in Remote roles will work primarily offsite (from home). If you live within a reasonable commute of an RTX site with other colleagues you interact with, your manager will discuss whether there is a degree of onsite presence associated with this role.

Candidates will learn more about role type and current site status throughout the recruiting process. For onsite and hybrid roles, commuting to and from the assigned site is the employee’s personal responsibility.

Requires advanced to expert knowledge of work area typically obtained through advanced education combined with experience.

May have broad knowledge of project management. Requires substantial knowledge of RTX projects, programs or systems in order to provide enhancements within job area.

Typically requires: A University Degree or equivalent experience and minimum 8 years prior relevant experience, or An Advanced Degree in a related field and minimum 5 years experience

Engineering/Other Technical Positions: Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 8 years of prior relevant experience unless prohibited by local laws/regulations.

Other Requirements

As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote.

Benefits

• The RTX Employee Scholar Program pays for tuition, academic fees and books for undergraduate and graduate study at approved educational institutions
• 401(k) plan that offers a broad range of investment options. For eligible employees, we will match up to 4% of your savings to help you build financial security
• Flexible work schedules and paid time off to accommodate work/life balance including many with every other Friday off
• Hired applicants may be eligible for benefits, including but not limited to, 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. Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement.
• Hired applicants may be eligible for 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.
• 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.
• RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window.

Salary

The 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 considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills. Hired applicants may be eligible for benefits, including but not limited to, 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. Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement. Hired applicants may be eligible for 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. 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. RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window.

Equal Opportunity Employer

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.