Senior Principal Software Architect (Onsite)

Date Posted:

2025-07-21

Country:

United States of America

Location:

HTX36: Richardson, TX 3200 E Renner Rd , Richardson, TX, 75082-2402 USA

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:

DoD Clearance: Secret

Are you looking to make a meaningful, positive impact while advancing your career?  

Here at Collins Aerospace, we’re enhancing mission critical systems for our military to deter against current and future adversarial threats. The need for passionate engineers who want to make a difference is now! Our team develops strategic solutions to ensure Nuclear Command, Control, and Communications (NC3) function accurately, on-time, every time, and under the most extreme circumstances for our national defense.  

We have an opportunity for a Senior Principal Software Architect to join a cohort of 20+ talented software engineers in developing our Very Low Frequency (VLF) solution for the military. The government has requested a need for greater cyber security threat protection, software assurance, improvement in availability and reliability while harnessing the latest technologies for rapid development and deployment.

What You Will Do:  

• Work collaboratively both within the software team, as well as with systems and hardware engineers to design and develop our solution for aircraft operators to control and monitor mission critical VLF transmitters

• Define, evolve, and optimize software and simulation design across mission-critical embedded platforms

• Serve as technical lead for cross-functional development, driving software solutions to systems and hardware engineers while ensuring development team understands platform and hardware constraints

• Mentor and guide engineering teams in architectural best practices, modularity, code structure, and performance tradeoffs in real-time systems

• Identify areas for optimization and collaborate on architecture-level decisions along with other software Subject Matter Experts (SMEs) to meet system constraints

• Define software requirements and Unified Modeling Language (UML) design diagrams within a Model Based Systems Engineering (MBSE) tool

• Support integration and verification within our automated test framework (gtest, python, JSON)

• Enhance simulation elements to reflect new hardware capabilities

• Drive technical design and software development practices to meet stringent Security Technical Implementation Guides (STIGs)

• Support document updates to meet customer Contract Data Requirements List (CDRL)

• Provide insight on future scope, task assignments, and process improvements within our Agile cadence

What You Will Learn: 

• Full software development lifecycle within defense industry

• Agile development within a classified environment

• Integration and validation on a variety of hardware controller cards

• Best practices in secure software coding on embedded systems

• Opportunity to grow into Technical Lead or Product Owner

Qualifications You Must Have: 

• 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

• Experience with real-time operating systems (RTOS), including development, debugging, and performance optimization of embedded software applications utilizing C/C++

• Experience with Model-Based Systems Engineering (MBSE), system decomposition, and interface control across disciplines

• Experience with software lifecycle processes, configuration control, and change management in high-integrity development environments

Qualifications We Prefer: 

• Experience with multithreading, memory management, and performance optimization in complex environments

• Experience in secure coding practices

• Experience with hardware-software integration and hardware-in-the-loop (HIL) testing

• Experience with development tool sets, including Jira, Git, Visual Studio Code, cmake

• Experience with Qt framework and development tools to generate C++ and QML code

• Experience with automated test frameworks, unit testing, and requirements traceability

• Experience in leadership roles (Technical Lead, Subject Matter Expert, or Product Owner)

What We Offer:

Some of our competitive benefits package includes:   

• 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!  

Learn More & Apply Now!​

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 Systems team helps civilian, military and government customers complete their most complex missions — whatever and wherever they may be. Our customers depend on us for intelligent and secure communications, missionized systems for specialized aircraft and spacecraft and collaborative space solutions. By joining our team, you’ll have your own critical part to play in ensuring our customer succeeds today while anticipating their needs for tomorrow. Are you up for the challenge? Join our mission today. 

*Please ensure the role type (defined below) is appropriate for your needs before applying to this role .

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. 

At Collins, the paths we pave together lead to limitless possibility. And the bonds we form – with our customers and with each other -- propel us all higher, again and again.  

Apply now and be part of the team that’s redefining aerospace, every day.  

The salary range for this role is 124,000 USD - 250,000 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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