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Legion Technical Solutions LLC VERIFIED EMPLOYER

Software Engineer 5.

Software Engineering & Dev Full-Time

Software Engineer 5: our view in 3 lines...

  • The Role:A senior Java software engineer is needed to build software for satellite ground systems supporting national security space and defense missions.
  • The Person:The person will design, develop, test, and maintain Java software for satellite ground systems, mission planning, scheduling, and command-and-control capabilities while contributing to cloud-native, DevSecOps, CI/CD, and automated testing work.
  • Requirements:The ideal candidate has strong object-oriented Java development experience, Java multithreading and concurrent programming, a bachelor’s degree in a STEM discipline, 8+ years of software development experience, and an active TS/SCI security clearance.

About the role

Benefits:
  • Dental insurance
  • Health insurance
  • Paid time off
  • Relocation bonus
  • Vision insurance
  • 401(k)
Introducing an exciting opportunity with Legion Technical Solutions!

Senior Software Engineer 

Java | TS/SCI Required
Location: Aurora, CO (Onsite)
Employer: Legion Technical Solutions (LTS)

Legion Technical Solutions is seeking an experienced Senior Software Engineer to support a cutting-edge national security program developing next-generation satellite ground systems. If you're passionate about building mission-critical software that supports space and defense missions, this is an opportunity to make a direct impact while working alongside some of the industry's top engineering talent.

What You'll Do

  • Design, develop, test, and maintain advanced Java software supporting satellite ground systems.
  • Build scalable, high-performance applications using object-oriented design principles.
  • Develop software for mission planning, scheduling, and command-and-control capabilities.
  • Collaborate with software engineers, systems engineers, and architects in an Agile development environment.
  • Contribute to modern cloud-native architectures utilizing AWS, microservices, and containerized applications.
  • Support DevSecOps initiatives, CI/CD pipelines, and automated testing.
Required Qualifications

  • Bachelor's degree in Computer Science, Software Engineering, or another STEM discipline.
  • 8+ years of professional software development experience.
  • Strong object-oriented Java development experience.
  • Experience with Java multithreading and concurrent programming.
  • Experience developing planning, scheduling, or other complex enterprise software systems.
  • Active TS/SCI security clearance (or active Top Secret clearance eligible for TS/SCI crossover).
  • U.S. Citizenship required.
Preferred Qualifications

  • Experience supporting satellite, space, or ground system programs.
  • AWS cloud and microservices architecture.
  • Docker and Kubernetes.
  • DevSecOps and CI/CD pipelines.
  • Spring Boot, Kafka, Jenkins, JUnit, Jira, Confluence, and Eclipse.
  • SAFe Agile development experience.
Why Join Legion Technical Solutions?

At Legion Technical Solutions, you'll work on high-impact engineering programs that help advance national security while enjoying the responsiveness and personalized support of a specialized engineering firm. We partner with premier aerospace and defense organizations to connect exceptional engineers with challenging, career-defining opportunities.

If you're ready to build software that powers the next generation of space and defense technologies, we'd love to hear from you.

Apply today or contact Legion Technical Solutions to learn more.
Published August 7, 2026
Location Aurora, IL
Job Type Full-Time