C5I Software Engineer II

Date Posted:

2026-04-29

Country:

United States of America

Location:

US-MA-TEWKSBURY-TB1 ~ 50 Apple Hill Dr ~ ASSABET BLDG

Position Role Type:

Onsite

U.S. Citizen, U.S. Person, or Immigration Status Requirements:

The ability to obtain and maintain a U.S. government issued security clearance is required.​ 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 after day 1

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.

We are seeking a Software Engineer II to support the C5I (Command, Control, Communications, Computing, Cyber, and Intelligence) product line within the Missile Defense Sensors (MDS) Software Department. The MDS mission is to deliver world-class radar and Command and Control (C2) software for our customers’ wide array of surveillance and warning systems.

Our C5I teams work across technologies, including C++, Java, JavaScript/TypeScript, Lua, C#, and Python, delivering Linux services, microservices, REST APIs, Windows front-end applications, and HTML/TypeScript UIs. We operate using Agile and DevSecOps principles, enabling high-frequency, high-quality deployments across the value stream.

The ideal candidate has a strong foundation in software development, works well in team environments, and is eager to grow their skills building complex, real-time, mission-critical systems.

This position is located onsite in Tewksbury, Massachusetts.

What You Will Do

• Assist with the requirements, design, development, and testing of software features across Linux services, microservices, REST APIs, and UI components.

• Develop and maintain software in languages such as C++, Java, JavaScript/TypeScript, Lua, C#, and Python as part of a multi-language, full-stack environment.

• Implement updates and enhancements to existing components to improve performance, maintainability, and reliability.

• Participate in internal reviews of software components—design reviews, code reviews, and test readiness reviews.

• Contribute to testing frameworks, unit testing, and CI/CD-driven software integration to enable consistent, high-quality deliveries.

• Work on tasks with clearly defined scope, schedule, and expectations while following established development processes and coding standards.

• Collaborate with Systems Engineering, Integration & Test, and other stakeholders to ensure proper integration and alignment.

What You Will Learn

• How C5I applications are designed and developed across multiple languages and platforms, including services and user interfaces.

• Techniques for debugging, troubleshooting, and resolving software issues in real-time and mission-critical environments.

• Best practices for Agile execution, Continuous Integration/Continuous Delivery (CI/CD), DevSecOps workflows, and high-frequency delivery pipelines.

• How to participate in structured software engineering processes, including requirements analysis, design collaboration, code reviews, and testing.

• How large, complex Command-and-Control and defense systems integrate across multiple engineering disciplines.

Qualifications You Must Have

• Typically requires a Bachelor's of Science Degree in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 2 years of prior relevant experience unless prohibited by local laws/regulations.

• Experience with one or more programming languages such as Java, C++, JavaScript/TypeScript, Lua, C#, or Python, with the willingness to learn others.

• Experience developing software in a team-based Agile environment.

• Ability to obtain U.S. government-issued Secret security cle