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# Principal HWIL Software Engineer

- **Company:** RTX
- **Location:** Tucson, AZ, United States
- **Experience:** Expert
- **Salary:** $107,500.0 - $204,500.0
- **Contract:** Contract
- **Skills:** Testing (Software), C (Programming Language), Agile Methodology, Data Analysis, C++ (Programming Language), Network Analysis, Data Structures, Linux, Embedded Operating Systems, Embedded Software, Firmware, Hardware-In-The-Loop Simulation, Python (Programming Language), MATLAB, Object-Oriented Software Development, Software Architecture, Real-Time Operating Systems, Software Engineering, Product Software Implementation Methods, Software Requirements Analysis, VxWorks, Model-Driven Development, Infrastructure Automation Frameworks, Information Technology
- **Published:** October 26, 2026
- **Apply:** https://www.techcareers.com/job.asp?id=3467198127&tx=KR10201LFU&pt=1&aff=0B19D771-A501-4A5E-8338-2A822B784D54&utm_source=Job%20Feed&utm_medium=textkernel&utm_campaign=DE&utm_term=0B19D771-A501-4A5E-8338-2A822B784D54

## About the Role

Active and transferable U.S. government issued security clearance is required prior to start date., Ability to obtain INTERIM U.S. government issued security clearance is required prior to start date, * Typically requires a Bachelor's degree in Computer Science, Engineering or other STEM related field and a minimum of 8 years of relevant experience.

 * Advanced experience across the Agile software development lifecycle in three or more of the following: C++ data structures and algorithms or C, C++, Python, and/or Object-Oriented Program Languages; integration of real-time software/firmware/hardware; software test equipment maintenance; software requirements definition,
 * Advanced experience including at least two of the following: Embedded Software, Embedded Software Security, Embedded Operating Systems (Linux, RTOS, VxWorks, etc.), Software Architecture Design and Implementation.
 * Active and transferable Secret U.S. government issued security clearance is required prior to start date with the ability to obtain program access after start.

Qualifications We Prefer

 * Strong organization, coordination, planning, teaming skills, as well as written and oral communication skills.
 * Experience generating technical documentation and reports.
 * Experience with RF theory and application in systems.
 * Experience with electronics design and/or conducting data analysis using tools such as Matlab.
 * Experience troubleshooting systems using test equipment such as oscilloscopes, logic analyzers, network analyzers, and/or spectrum analyzers.
 * Experience contributing to the design, development and/or integration of the test equipment and/or hardware (software that controls complicated hardware systems)
 * Strong organization, coordination, planning, teaming skills, as well as written and oral communication skills.
 * Experience with Software Agile Process.
 * Experience developing software using a Linux operating systems.
 * Some comprehension of Earned Value Management System (EVMS) terminology.

## Description

* Collaborate in a multi-disciplinary team to develop software to control Hardware-In-the-Loop (HWIL) facilities (flight simulators for missiles).
 * Software design, coding and integration in a real-time environment.
 * Determines end user needs by analyzing system capabilities to resolve problems on program intent, output requirements and input data acquisition. Ensures hardware and software standards are met.
 * Designs and implements build procedures that are used to support hardware and software product development and use.
 * May develop software configuration standards for company-wide use.
 * May train software developers in the use of configuration management tools and the implementation of software quality standards. Includes control modeling (model based design)