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# Sentinel Sr Principal Software Engineer

- **Company:** Northrop Grumman
- **Location:** Roy, UT, United States
- **Experience:** Expert
- **Salary:** $122,800 - $184,200
- **Contract:** Permanent contract
- **Skills:** C (Programming Language), Java (Programming Language), Microsoft Windows, Adobe InDesign, Agile Methodology, Application Frameworks, JIRA, Microsoft Azure, C Sharp (Programming Language), C++ (Programming Language), Communications Protocols, Information Systems, Computer Programming, Databases, Serialization, Relational Databases, Software Debugging, Linux, Github, JSON, Python (Programming Language), PostgreSQL, MySQL, Object-Oriented Software Development, Open Source Technology, Systems Development Life Cycle, Qt (Software), Rapid Prototyping Process, RS-232, SAP (Applications), Serial Communications, Software Engineering, Systems Integration, TCP/IP, Gitlab, SC Clearance, Build Management, Information Technology, Jenkins
- **Published:** November 5, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9293623/sentinel-sr-principal-software-engineer

## About the Role

Senior Principal Software Engineer: 8 Years with Bachelor's in related field of study, 6 Years with Masters, 4 Years with PhD or 04 additional years in lieu of a degree.

 * U.S. citizenship required with an active Secret clearance/SAP at day 1.
 * Strong communication skills and the ability mentor and coach junior engineers.
 * Hands-on programming experience with one or more high-level programming languages such as Python, C#, C/C++, and Java.
 * Working knowledge of network and communication protocols, including experience sending and receiving data over TCP/IP and UDP sockets, as well as familiarity with serial communication interfaces (e.g., RS-232/RS-485) and related debugging tools.
 * Experience working with JSON as a primary data format, including schema design, validation, serialization/deserialization in code (e.g., C++/Python/Java), and persisting JSON documents or fields in databases such as PostgreSQL (JSON/JSONB), or similar.
 * Experience with QT cross-platform C++ application framework.
 * Experience with DoD training and simulation systems development.
 * Full life cycle design, integration, verification, deployment, and in-service support.
 * Experience with troubleshooting and debugging systems., * Bachelor's degree in Science, Technology, Engineering, or Mathematics (STEM) with 8+ years of experience in a related engineering field (Computer Science, Information Systems, or Computer/Electrical Engineering); OR
 * Master's degree in Science, Technology, Engineering, or Mathematics (STEM) with 6+ years of experience in a related engineering field.
 * Experience with software CI/CD tools such as GitHub, GitLab, Jenkins
 * Experience with development task tracking software such as Jira or Azure DevOps
 * Experience with relational database design, management, optimization, and interaction. PostgreSQL or MySQL preferred.
 * Experience with Agile software development, object-oriented architecture, software integration and testing.
 * Software rapid prototyping experience to include designing and implementing solutions with minimal formal requirements.
 * The ability to learn new technologies quickly and independently solve problems in a fast-paced environment.

## Description

Northrop Grumman Defense Systems would like you to join our team as a Sr Principal Software Engineer. This position will be located in Roy, UT and will support the Sentinel Program. Northrop Grumman supports the Air Force's sustainment, development, production and deployment of hardware and system modifications for Intercontinental Ballistic Missile (ICBM) Ground and Airborne Launch Control Systems, Launch Facilities and associated infrastructure.

What You'll Get to Do:

 * Assist with software design and development of specialized tools and techniques.
 * Provides/authors documentation, participate in design, code, and software readiness reviews in accordance with the Government's software development procedures and processes. Program systems in languages including C, C++, Java, and Python.
 * Develop Windows, Linux, and cross-compiled applications; Embedded platform development using proprietary, COTS, GOTS, or open-source build environments.
 * Supporting the software life cycle engineering execution to include design, integration, verification, deployment, and in-service support.
 * Support the design and implementation of sustainable continuous integration and continuous delivery (CI/CD) pipelines for multiple products.