Senior Principal Software Engineer – Onsite

RTX

Senior Principal Software Engineer at Collins Aerospace delivering software solutions for critical defense missions. Leading engineering activities and collaborating with multidisciplinary teams.

Posted 6/11/2026full-timeRichardson • Florida, Iowa, Texas • 🇺🇸 United StatesSenior💰 $132,400 - $251,600 per yearWebsite

Tech Stack

Tools & technologies

Cyber SecurityJavaLinuxRTOS

About the role

Key responsibilities & impact

Apply expert technical knowledge to solve highly complex challenges and deliver innovative software solutions that support customer and business objectives.
Lead software engineering activities throughout the software lifecycle, including development, integration, testing, deployment, modernization, and/or sustainment efforts.
Develop, implement, and enhance software solutions, technical approaches, processes, and standards across a variety of technologies, products, and mission areas.
Partner with multidisciplinary teams, customers, and stakeholders to solve complex technical challenges and deliver mission-critical capabilities.
Drive technical solutions supporting areas such as secure communications, mission systems, cybersecurity, autonomous systems, embedded software, and software modernization.
Influence technical direction, engineering strategies, and program outcomes through the application of deep domain expertise.
Communicate technical concepts, recommendations, and program status to audiences ranging from engineering teams to customers and executive leadership.
Serve as a subject matter expert and technical authority within their discipline.

Requirements

What you’ll need

Experience developing software applications, systems, or solutions using programming languages such as C/C++, Java, or similar languages.
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.
Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 10 years prior relevant experience or an Advanced Degree in a related field and minimum 7 years of experience.
Active and transferable Secret or Top Secret U.S. government issued security clearance.
Experience working within the software development lifecycle, including design, development, integration, testing and maintenance.
Experience with embedded software, real-time operating systems (RTOS), Linux, DevSecOps, CI/CD pipelines, automated testing frameworks or related software development environments.
Knowledge of cybersecurity principles, secure software development practices, or software assurance methodologies.
Experience supporting technical domains such as mission systems, communications systems, cybersecurity, autonomous systems or related domains.

Benefits

Comp & perks

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
And more!

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

C/C++Javaembedded softwarereal-time operating systems (RTOS)LinuxDevSecOpsCI/CD pipelinesautomated testing frameworkssoftware development lifecyclesoftware assurance methodologies

Soft Skills

communicationleadershipproblem-solvingcollaborationinfluencetechnical directionstakeholder engagementsubject matter expertise

Certifications

U.S. government issued security clearanceSecret security clearanceTop Secret security clearance