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At RTX, the world 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 spanet 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.

We are seeking a Senior Software Engineer to support the C5I (Command, Control, Communications, Computing, Cyber and Intelligence) product line within the Missile Defense Sensors (MDS) Software Department. Our C5I teams deliver multi‑language, multi‑platform software across Linux services, microservices, REST APIs, Windows front‑end applications, and HTML/TypeScript UIs.

The C5I ecosystem includes development in C++, Java, JavaScript/TypeScript, Lua, C, and Python, built and deployed through CI/CD pipelines in an Agile DevSecOps environment. This role provides the opportunity to contribute to mission‑critical systems that support the Air Defense Operations Center (ADOC) and broader C5I capabilities.

This position is located onsite in Tewksbury, Massachusetts.

What You Will Do

• Design, develop, integrate, and test software components across C5I applications, including Linux services, microservices, REST APIs, and UI components.

• Contribute to implementation of algorithms and system features that enable mission‑critical functionality.

• Analyze, implement, and validate software modifications to enhance performance, reliability, and maintainability.

• Participate in and occasionally lead software design reviews, code reviews, and technical discussions.

• Perform root‑cause analysis for complex defects, using debugging tools and instrumentation to diagnose performance and functional issues.

• Collaborate closely with Systems Engineering, Integration & Test, and Platform teams to ensure seamless integration and alignment to requirements.

• Contribute to Agile execution and continuous‑improvement efforts, including refining development standards and documentation.

• Support high‑quality, recurring software deliveries that meet program milestones and customer expectations.

• Mentor and guide junior engineers, fostering a culture of knowledge sharing and technical excellence.

What You Will Learn

• How to design and integrate multi‑language, multi‑platform C5I components spanning services, UIs, and mission applications.

• Techniques for analyzing and improving complex algorithms and system behaviors.

• Best practices for Agile and DevSecOps pipelines used to build and deliver C5I software.

• Effective collaboration across Systems Engineering, Integration & Test, and Platform engineering teams.

• Leadership skills for guiding junior engineers and contributing to team technical direction.

Qualifications You Must Have

• Typically requires a Bachelors of Science Degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 5 years of prior relevant experience unless prohibited by local laws/regulations.

• Experience developing software in C++ and/or Java, including Git workflows, code reviews, and Linux/UNIX development environments.

• Experience developing software in an Agile Scrum or Kanban team environment.

• Experience collaborating with cross‑functional engineering teams and contributing to technical problem solving.

• Ability to obtain U.S. government issued Secret security clearance is required after start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Qualifications We Prefer

• Domain knowledge in C2 and C5I operations, such as Link16, HMI development, Mission Defense Planning, Simulation & Modeling, or TEWA.

• Experience with radar, missile defense, or other large‑scale, mission‑critical defense systems.

• Experience with integration and testing frameworks, and strong debugging skills.

• Ability to work effectively in fast‑paced environments with time‑critical requirements.

• Experience designing or contributing to modular, reusable software architectures.

• Experience with JIRA/Confluence, Git workflows, CI/CD environments, Eclipse, and related toolchains.

• Familiarity with CMMI/IPDS processes, MBSE tools such as Cameo, or AI‑enabled software development practices.

• Strong communication skills and the ability to lead technical discussions and mentor junior team members.

• Strong understanding of software development lifecycle activities, including design, implementation, integration, and testing.

Learn More & Apply Now!

Please ensure the role type defined below is appropriate for your needs before applying to this role. This position is classified as:

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.

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

This position requires a security clearance. DCSA Consolidated Adjudication Services (DCSA , 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

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.

The salary range for this role is 86,800 USD - 165,200 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.

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.

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