> Markdown version of [/jobs/ext/1590184-senior-principal-software-engineer-onsite](https://www.wearedevelopers.com/jobs/ext/1590184-senior-principal-software-engineer-onsite). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Principal Software Engineer, Onsite - **Company:** RTX - **Location:** Boston, MA, United States - **Experience:** Expert - **Salary:** $132,400.0 - $251,600.0 - **Contract:** Permanent contract - **Skills:** Agile Methodology, Systems Engineering, Automation of Tests, C++ (Programming Language), Continuous Integration, Common Object Request Broker Architecture, Linux, DevOps, Field-Programmable Gate Array (FPGA), Python (Programming Language), Object-Oriented Software Development, Performance Tuning, Scrum Methodology, Real-Time Operating Systems, Software Engineering, Systems Modeling Language, Systems Integration, UML, VxWorks, Scripting, Model-Driven Development, Test-Driven Development (TDD), Containerization, Jenkins, Microservices - **Published:** July 27, 2026 - **Apply:** https://www.careerjet.com/job/us6cb8c0d878303bcbbd1125963ab8e48d/eaa ## About the Role Experience in Software Engineering to include experience working various phases of the software development lifecycle Prior experience in a technical or team leadership role, such as SW Architect, SW Lead etc 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 Applied experience in Unified Modeling Language (UML) and Object-Oriented Analysis and Design (OOA/D) Experience working in a collaborative team environment that requires communication with other engineering disciplines, Program, and external stakeholders Mentoring experience with junior engineers 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 10 years prior relevant experience or an Advanced Degree in a related field and minimum 7 years of experience Qualifications We Prefer 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 Experience with Model Driven Development Experience with software integration on custom hardware FPGA interfaces (memory mapped and SW/FW messaging) experience Working experience with Microservice Architectures and Containerized Applications Versal (ARM assembly) knowledge Performance optimization experience CORBA experience Scripting language (e.g. Python) ## Description 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, 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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