NextGen Federal Systems, LLC
aerospace or defense
SeniorSoftwareEngineer
“Senior Software Engineer at NextGen Federal Systems, LLC. Skills: Systems Tool Kit (STK), STK Engine, STK Components, Cesium, Python, Flask, React JS, Full Stack Development. Develop, customize, and maintain STK-based applications to support mission planning, analysis, and visualization. Integrate STK (Engine, Components, or Desktop) with external tools, models, and data sources to enable end-to-end mission workflows”
What You'll Achieve.
measurably improve our client’s organizational performance
Industry & Context.
Analyze and interpret simulation results; Troubleshoot and enhance existing tools
Active Top Secret (TS) clearance required, SCI eligibility preferred
What They're Looking For.
Must Have
BS or equivalent in Computer Science, Engineering, Mathematics, or equivalent technical degree, 5+ years’ prior work experience in the aerospace or defense industry, with demonstrated software development experience, Proficiency in Python, experience with backend frameworks such as Flask is required, Active Top Secret (TS) clearance required
Nice to Have
Experience customizing or automating STK-based tools or applications highly desired (including STK, STK Engine, STK Components, and/or Cesium), Experience integrating tools via APIs (REST or similar), expertise in React JS for building modern and responsive user interfaces is highly desirable, Knowledge of version control systems, preferably Git is highly desirable, Proven experience as a Full Stack Developer or similar role is highly desirable, SCI eligibility preferred, Experience with STK Engine, STK Components, or Cesium, Experience linking STK analyses to MBSE environments (e. g. , parameter passing, trade studies, digital thread integration), Familiarity with digital engineering ecosystems, mission thread development, or model orchestration tools, Experience with Docker, cloud environments, or DevSecOps practices, Frontend development experience (e. g. , React)
What You'll Do.
and maintain STK-based applications to support mission planning
Integrate STK (Engine
or Desktop) with external tools
and data sources to enable end-to-end mission workflows
Implement backend services using Python and support frontend interfaces as needed
Analyze and interpret simulation results
providing actionable insights to engineering teams and stakeholders
Support traceability between mission analysis outputs and system models
ensuring consistency across the digital engineering environment
Support deployment and execution of applications in modern environments (e. g.
containerized or cloud-based)
Contribute to documentation
and technical deliverables
Troubleshoot and enhance existing tools to improve performance
How You'll Work.
Team & Collaboration
interfacing directly with end-customers and customer leadership; providing actionable insights to engineering teams and stakeholders
Communication Scope
interfacing directly with end-customers and customer leadership
Process & Methodology
responsibly executing multiple tasks in accordance with priorities and deadlines
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