Software Engineer Level 3/4 (AHT)

Northrop Grumman Defense Systems is seeking a Software Engineer Level 3/4 to join our multi‑discipline Advanced Weapons engineering team. The role focuses on the development, integration, deployment, and sustainment of satellite ground‑segment software that supports test events, launch rehearsals, and operational missions.

Location: Northridge, CA – no remote/telework option.
Security: Active U.S. DoD Secret clearance

What You’ll Get to Do

• Full‑stack development at the OS, platform, and mission‑unique software layer.
• Design and implement applications/services using service‑oriented or object‑oriented architectures and messaging protocols.
• Work with a variety of languages and toolsets, including C, C++, C# or Java or Python.
• Act as a self‑starter, making decisions that consider overall project budget and schedule.
• Support ground‑segment operations and associated configurations, troubleshooting both software errors and hardware issues that affect ground software.
• Participate in Acceptance Test events – planning, execution, and reporting.
• Develop and maintain test automation frameworks and scripts.
• Configure ground‑segment software for development, test, and operational environments.
• Resolve and remediate software defects; implement enhancements driven by customer change requests or mission needs.
• Provide ground‑software support during launch and launch‑rehearsal events.
• Install new ground‑segment software across operational, development, and test environments.

Principal Software Engineer (Level 3)

• Bachelor’s degree in a STEM related field with 5 years of Computer or Software engineering experience, or 3 years of experience with a Master’s degree.
• Real world experience working in C/C++ and knowledge in C#, Java, Python
• Experience working with Windows, Unix/Linux OS
• Experience with full software lifecycle: specification, design, implementation, documentation, integration, debug and maintenance are required
• Experience in Atlassian Products like Jira, Gitlab, Confluence and have experience running teams in the Scrum Master capacity
• Proficiency in diagnosing electronic, mechanical, and hydraulic systems, including the use of oscilloscopes, multi-meters, and signal generators
• Active DoD Secret Clearance, with ability to be cleared to special access programs

Sr Principal Software Engineer (Level 4)

• Bachelor’s degree in a STEM related field with 8 years of Computer or Software engineering experience, or 6 years of experience with a Master’s degree, or 4 years of experience with a PhD
• Expert level real world experience working in C/C++ and knowledge in C#, Java, Python
• Extensive experience working with Windows, Unix/Linux OS
• Experience with full software lifecycle: specification, design, implementation, documentation, integration, debug and maintenance are required
• Experience in Atlassian Products like Jira, Gitlab, Confluence and have experience running teams in a Product Owner or Team Lead capacity
• Proficiency in diagnosing electronic, mechanical, and hydraulic systems, including the use of oscilloscopes, multi-meters, and signal generators. Expertise in maintaining, adjusting, and calibrating precision measurement equipment to verify they meet established standards and working with different network protocols
• Active DoD Secret Clearance, with ability to be cleared to special access programs

Preferred Qualifications:

• Software Development and/or Software Engineering background with an Agile/DevSecOps mindset
• Ability to troubleshoot hardware/software and identify root cause issues
• Ability to set up test equipment to support software development
• Experience working with hardware programmers such as JTAG
• Understanding of TCP/IP protocols, serial communication, and MIL-STANDARD 1553 protocol
• Experience with Visual Studio

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