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Software Engineer Sr, Level 3

Job in King of Prussia, Montgomery County, Pennsylvania, 19406, USA
Listing for: Lockheed Martin
Full Time position
Listed on 2026-07-07
Job specializations:
  • Software Development
    DevOps, Software Engineer, Backend Developer, Software Testing
Salary/Wage Range or Industry Benchmark: 80000 - 110000 USD Yearly USD 80000.00 110000.00 YEAR
Job Description & How to Apply Below

Space is a critical domain, connecting our technologies, our security, and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can innovate, invest, inspire, and integrate our capabilities to transform the future.

At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future‑ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and forming partnerships across industries and around the world. We’re advancing spacecraft and the workforce to fuel the next generation.

And we’re reimagining how space can connect us, ensuring security and prosperity.

Responsibilities
  • Generate and simulate operational‑level plans to explore the art of the possible and how to defend the ultimate high ground in a future space war.
  • Dynamically optimize terrestrial and space‑based sensors to provide comprehensive space domain awareness.
  • Strategically optimize the placement and maneuvering of constellations of satellites to satisfy multiple, evolving priorities.

Our team leverages industry‑standard open‑source software solutions such as Git Lab, Kubernetes, Docker, and Rancher. Our automation‑first, “everything as code” mindset allows our software engineers to focus their time and efforts on building cutting‑edge functionality for end users.

Qualifications
  • Basic Qualifications:
    • Software development experience with object‑oriented programming languages such as Java and JavaScript (Node.js).
    • Software development experience with .NET or C#.
    • US citizenship required; no clearance required to start but must be able to obtain and maintain a TS/SCI security clearance.
  • Desired

    Skills:

    • Experience working on large‑scale software projects with multiple teams and stakeholders.
    • Experience with software version control tools, such as Git.
    • Experience developing software with CI/CD build tools (Git Lab, Jenkins).
    • Familiarity with software test best practices, including unit test, integration test, and end‑to‑end test.
    • Ability to work effectively in a fast‑paced and rapidly changing environment.
    • Strong time‑management skills that enable on‑time project delivery.
    • Familiarity with the Space Domain.
Security Clearance

Clearance Level: TS/SCI. This position requires a government security clearance, and you must be a U.S. citizen for consideration.

Location & Work Schedule

Ability to Work Remotely: Onsite full‑time. The work will be performed onsite at a designated Lockheed Martin facility.

Work Schedules: Lockheed Martin supports a variety of alternate work schedules, including 40‑hour weeks, condensed schedules, and 9x80 with every other Friday off.

Position Details

Experience Level: Experienced Professional
Business Unit: SPACE
Relocation Available: Possible
Career Area: Software Engineering
Type: Full‑Time
Shift: First

Lockheed Martin is an equal‑opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics.

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