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# Principal Software Engineer, Onsite

- **Company:** RTX
- **Location:** Marlborough, MA, United States
- **Experience:** Expert
- **Salary:** $107,500.0 - $204,500.0
- **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 26, 2026
- **Apply:** https://globalhr.wd5.myworkdayjobs.com/REC_RTX_Ext_Gateway/job/US-MA-MARLBOROUGH-MA4--1001-Boston-Post-Rd--BLDG-4/Principal-Software-Engineer--Onsite_01860621

## About the Role

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, * Experience in Software Engineering to include experience working various phases of the software development lifecycle

 * Prior experience in leading a small engineering team
 * 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 8 years prior relevant experience or an Advanced Degree in a related field and minimum 5 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
 * 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

* 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


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