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# Principal Software Engineer

- **Company:** Northrop Grumman
- **Location:** El Segundo, CA, United States
- **Salary:** $93,300.0 - $171,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), 3d Models, Systems Engineering, Build Automation, C++ (Programming Language), Static Program Analysis, Github, Python (Programming Language), Local Area Networks, Network Interface, Real-Time Operating Systems, Fortify (Software), SAP (Applications), Simple Network Management Protocols, Software Engineering, Verification and Validation (Software), SonarQube, Data Streaming, TCP/IP, Virtual Local Area Networks, Gitlab, Atlassian Tools
- **Published:** September 6, 2026
- **Apply:** https://www.disabledperson.com/jobs/74932660-principal-software-engineer

## About the Role

Northrop Grumman Aeronautics Systems is looking to add a Principal Software Engineer to join our team on site in San Diego, CA, Palmdale, CA, El Segundo, CA or Oklahoma City, OK. The candidate should be a self-starter with familiarity working in an Integrated Product Team construct. This position will be part of the Models & Simulation team, participate in planning, integration, and delivery of software releases, and troubleshooting technical issues., * Bachelor's Degree in a STEM (Science, Technology, Engineering or Mathematics) discipline and 5 years of related engineering experience; OR a Master's degree in a STEM discipline and 3 years of related engineering experience; OR a PhD in a STEM discipline and 1 year of related engineering experience.

 * Demonstrated professional experience developing software in C/C++
 * Demonstrated professional experience with software change control, and change management such as: Atlassian tool suite, GitHub, AND/OR GitLab
 * Demonstrated Professional Experience with the full Software Development Life Cycle (SDLC)

 * Active U.S. Government Top Secret clearance (with a background investigation within the past 5 years or enrolled into Continuous Evaluation).
 * Ability to obtain and maintain initial Special Access Program (SAP) access via a Program Access Request (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.
 * Ability to obtain and maintain subsequent SAP PARs following commencement of employment to be able to completely support statement of work., * Current applicable Special Access Program (SAP) clearance.
 * Demonstrated professional experience developing software in Python
 * Differentiating characteristics include demonstrated leadership, teamwork capabilities, excellent oral and written communications skills, and strong interpersonal communication skills at all levels of employees and management.
 * Demonstrated professional experience developing software Java
 * Experience with software network interfaces -and troubleshooting networks (TCP/IP, UDP, LAN, VLAN, SNMP or others).
 * Experience in safety?critical embedded real?time software on RTOS platforms
 * Demonstrated professional experience with static code analysis tools such as: Coverity, SonarQube, AND/OR Fortify

## Description

* Develop, implement, and maintain modular simulation and modeling software (e.g., C++, Python) to support system behaviors and scenarios.
 * Integrate simulation components with system interfaces, middle-ware, and test harnesses; ensure interoperable data flows and real-time performance.
 * Design and execute verification and validation tests, analyze results, identify defects, and implement fixes to ensure model fidelity and accuracy.
 * Optimize simulation performance and scalability; profile code, reduce latency, and support CI/CD pipelines for automated builds and deployments.
 * Collaborate with systems engineers, testers, and stakeholders to translate requirements into simulation scenarios, produce technical documentation, and support 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 10% may be required.