Senior Principal Software Architect (Onsite)

<p><b>Date Posted:</b></p><span>2026-08-06 </span><p><b>Country:</b></p>United States of <span>America </span><p><b>Location:</b></p>US-TX-RICHARDSON-461 ~ 3200 E Renner Rd ~ RENNER BLDG <span>461 </span><p><b>Position Role Type:</b></p><span>Onsite </span><p><b><span>U.S. Citizen, U.S. Person, or Immigration Status Requirements:</span> </b></p>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 <span>clearance​ </span><p><b>Security Clearance Type: </b></p>Secret - <span>Current </span><p><b>Security Clearance Status: </b></p>Active and existing security clearance required on day 1<p></p><p></p><p>Raytheon Company Managed by Collins Aerospace</p><p></p><p>Collins Aerospace, an RTX company, is a leader in technologically advanced and intelligent solutions for the global aerospace and defense industry. Collins Aerospace has the capabilities, comprehensive portfolio, and expertise to solve customers’ toughest challenges and to meet the demands of a rapidly evolving global market.</p><p></p><p>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.</p><p></p><p><b><u>Sign On Bonus Eligible</u></b></p><p></p><p><b><u>What You Will Do:</u></b></p><ul><li>Work collaboratively both within the software team, as well as with systems and hardware engineers to design and develop our solution to control and monitor mission critical VLF transmitters</li><li>Define, evolve, and optimize software and simulation design across mission-critical embedded platforms</li><li>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</li><li>Mentor and guide engineering teams in architectural best practices, modularity, code structure, and performance tradeoffs in real-time systems</li><li>Identify areas for optimization and collaborate on architecture-level decisions along with other software Subject Matter Experts (SMEs) to meet system constraints</li><li>Define software requirements and Unified Modeling Language (UML) design diagrams within a Model Based Systems Engineering (MBSE) tool</li><li>Develop and integrate multi-threaded embedded software using C and C++ within a Real Time Operating System (RTOS)</li><li>Support integration and verification within our automated test framework (gtest, python, JSON)</li><li>Enhance simulation elements to reflect new hardware capabilities</li><li>Drive technical design and software development practices to meet stringent Security Technical Implementation Guides (STIGs)</li><li>Support document updates to meet customer Contract Data Requirements List (CDRL)</li><li>Provide insight on future scope, task assignments, and process improvements within our Agile cadence</li></ul><p></p><p><b><u>What You Will Learn:</u></b></p><ul><li>Full software development lifecycle within defense industry</li><li>Agile development within a classified environment</li><li>Integration and validation on a variety of hardware controller cards</li><li>Best practices in secure software coding on embedded systems</li><li>Opportunity to grow into Technical Lead or Product Owner</li></ul><p></p><p><b><u>Qualifications You Must Have: </u></b></p><ul><li>Extensive experience with real-time operating systems (RTOS), including development, debugging, and performance optimization of embedded software applications</li><li>Experience with Model-Based Systems Engineering (MBSE), system decomposition, and interface control across disciplines</li><li>Experience with software lifecycle processes, configuration control, and change management in high-integrity development environments</li><li>Active and transferable Secret U.S. government issued security clearance is required prior to start date</li><li>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<br/> </li></ul><p><b><u>Qualifications We Prefer:</u></b></p><ul><li>Experience with multithreading, memory management, and performance optimization in complex environments</li><li>Experience in secure coding practices</li><li>Experience with hardware-software integration and hardware-in-the-loop (HIL) testing</li><li>Experience with development tool sets, including Jira, Git, Visual Studio Code, cmake</li><li>Experience with Qt framework and development tools to generate C++ and QML code</li><li>Ability to re