Senior Software Engineer (Onsite)

RTX; Marlborough (MA); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Medical insurance

Vacation time

401(k) plan with matching

Tuition assistance

Relocation assistance

Job summary

RTX, including Collins Aerospace, is seeking a Sr Software Engineer to join the Strategic Communication Software Engineering team in Marlborough, MA. You will participate on cross-disciplinary teams, own end-to-end development, and advance software process maturity.

The role requires experience in embedded C++, RTOS, Linux, and collaboration with multiple engineering disciplines; a U.S. government security clearance is required on day one.

Qualifications

• Experience across the software development lifecycle for embedded systems.
• Proficiency in C++, RTOS, and Linux environments.
• Active and transferable U.S. government security clearance prior to start date.
• Typically requires STEM degree with 5+ years of experience or an advanced degree with 3+ years.

Responsibilities

• Participate on cross-functional product teams using agile software methods.
• Own full lifecycle of product development from architecture to field support.
• Work toward high process maturity per recognized software standards.

Skills

Software lifecycle

C++

RTOS

Embedded systems

Linux

Security clearance

Team collaboration

Education

STEM degree

Advanced degree

Tools

Jenkins

CI/CD tools

SysML/UML

Containerization

Job description

Job Details

Date Posted: 2026-10-30

Country: United States of America

Location: US-MA-MARLBOROUGH-MA4 ~ 1001 Boston Post Rd ~ BLDG 4

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: Secret - Current

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.

Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense.

Raytheon Company, Managed by Collins Aerospace Collins Aerospace, an RTX company, is a leader in engineering and proposal teams to successfully execute programs and prepare responsive proposals aimed at making the world a safer place. Come support those who provide us with all the freedoms we enjoy. Our commitment to providing an environment that supports innovation, teamwork, and growth opportunities are primary reasons engineers come to work at RTX.

Role Summary

The Strategic Communication Software (SW) Engineering Department has an opportunity for a talented Sr. Software Engineer to join our team.

What You Will Do

• Participate on collaborative, cross-disciplined integrated product teams, often employing agile software development techniques
• Responsible for the full lifecycle of product development, from architecture and design, through integration, test, and field support
• Work and learn the highest software engineering process maturity level as recognized by the Software Engineering Institute

Qualifications You Must Have

• Experience in Software Engineering to include experience working various phases of the software development lifecycle
• Experience with Software Development Using C++
• Experience with real-time operating systems (RTOS), embedded programming, processor/board architecture and design
• Working knowledge of Linux, VxWorks or other Real time operating systems
• Experience working in a collaborative team environment that requires communication with other engineering disciplines, Program, and external stakeholders
• 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
• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experience

Qualifications We Prefer

• Applied experience in Unified Modeling Language (UML) and Object-Oriented Analysis and Design (OOA/D)
• Understanding of standard system engineering design artifacts such as Use Cases and SysML diagrams.
• Experience with Agile lifecycle process including Scrum, Continuous Integration, and Test-Driven Development Methodologies
• Experience with DevOps, Jenkins and automated testing
• Exposure to Model Driven Development
• Experience with software integration on custom hardware
• Working experience with Microservice Architectures and Containerized Applications
• Scripting language (e.g. Python)

What We Offer

• Medical, dental, and vision insurance
• Three weeks of vacation for newly hired employees
• Generous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy option
• Tuition reimbursement program
• Student Loan Repayment Program
• Life insurance and disability coverage
• Optional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection
• Birth, adoption, parental leave benefits
• Ovia Health, fertility, and family planning
• Adoption Assistance
• Autism Benefit
• Employee Assistance Plan, including up to 10 free counseling sessions
• Healthy You Incentives, wellness rewards program
• Doctor on Demand, virtual doctor visits
• Bright Horizons, child and elder care services
• Teladoc Medical Experts, second opinion program
• Eligible for relocation
• And more!

Closing Statement

Do you want to be a part of something bigger? A team whose impact stretches across the world, and even beyond? At Collins Aerospace, our Mission