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# Sr Principal Software Engineer

- **Company:** Northrop Grumman
- **Location:** Palmdale, CA, United States
- **Experience:** Expert
- **Salary:** $116,300.0 - $213,400.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), 3d Models, Agile Methodology, Systems Engineering, JIRA, Build Automation, C++ (Programming Language), Static Program Analysis, Software Debugging, Linux on Embedded Systems, Middleware, Ethernet, Python (Programming Language), Software Architecture, Systems Development Life Cycle, Real-Time Operating Systems, Fortify (Software), SAP (Applications), Software Engineering, Verification and Validation (Software), SonarQube, Data Streaming, Subversion, VxWorks, Multithreading, Fibre Channel, Gitlab, Bitbucket, Atlassian Bamboo, Jenkins, Programming Languages
- **Published:** October 26, 2026
- **Apply:** https://www.techcareers.com/job.asp?id=3467072460&tx=JT9587TTZ&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

Bachelor's Degree in a STEM (Science, Technology, Engineering or Mathematics) discipline and 8 years of related engineering experience; OR a Master's degree in a STEM discipline and 6 years of related engineering experience; OR a PhD in a STEM discipline and 4 years of related engineering experience.

-Experience with the full SW Development Life Cycle (SDLC)

-Experience with the following programming and scripting languages: C/C++, and Python

-Experience with two of the following tools: Jira, Crucible, Bitbucket, Gitlab, Subversion, Bamboo, Jenkins, Sonarqube, Fortify, or Coverity

-Experience with Agile SW development, embedded system programming, SW integration and testing

-Familiarity with at least one of the wire data interfaces: 1553, 1394, Serial, CAN, Ethernet/IP, or Fibre Channel, etc.

-Excellent communication, interpersonal skills, and the ability to interface with all levels of employees and management

-Ability to collaborate with systems engineers, hardware designers and integration/test engineers to develop and maintain complex SW systems

-Active in-Scope, U.S. Government Top Secret clearance.

-Ability to obtain and maintain initial Special Program Access (SAP/PAR). This SAP/PAR must be obtained prior to commencement of employment and must be obtained within a reasonable amount of time as determined by the company to meet its business needs. (Of note: SAP/PAR will be upgraded once selected candidate is in role. Therefore, candidate must also be able to obtain and maintain upgraded SAP/PAR.)

Preferred Qualifications:

-Current applicable Special Access Program (SAP) clearance.

-Active U.S. Government Top Secret SCI clearance (with a background investigation within the past 5 years or enrolled into Continuous Evaluation).

-Experience and proficiency in software architecture, design, implementation, integration, and debugging C++ SW running on Real-Time Operating systems such as: VxWorks, Integrity, AND/OR Real Time Embedded Linux.

-Experience with developing multi-threaded SW

-Differentiating characteristics include demonstrated leadership, teamwork capabilities, excellent oral and written communications skills, and strong interpersonal communication skills.

-Demonstrated professional experience developing software Java

-Can identify moderate execution defects by only reading code

-Understanding of how their embedded SW component will fit into a larger SW system / architecture

-Able to document, capture, and present software architectural components in modeling or diagramming tools

-Experience with Static & Dynamic Code Analysis

## Description

* Provide technical leadership for the development, implementation, and maintenance of modular simulation and modeling software (e.g., C++, Python), guiding the team in architecture, standards, and best practices.
 * Lead the integration of simulation components with system interfaces, middleware, and test harnesses; establish integration strategies and ensure interoperable data flows and real-time performance across the team.
 * Define and oversee verification and validation strategies, review test plans and results, and direct the resolution of defects to ensure model fidelity, accuracy, and traceability to requirements.
 * Drive performance and scalability optimization efforts; set priorities for profiling and tuning, reduce latency, and champion CI/CD pipelines for automated builds, testing, and deployments.
 * Coordinate with systems engineers, testers, and stakeholders to translate requirements into simulation capabilities and scenarios; review and approve technical documentation; and lead technical presentations and demonstrations.

The selected candidate will be required to work full-time, on-site at our facility. There is no remote / hybrid / telework available for this position. Travel up to 25% may be required.