TS/SCI - Principal Software Engineer with Security Clearance

All Qualified candidates will be responded to in 24 hours or less Active TS/SCI w/ CI Poly is a must Employment type: Full Time W-2 or Contract Rate: open to Negotiation Benefits: including Health, Dental Vision, PTO, Holidays, 401K,etc.. Principal Software Engineer Salary range: $180k+/yr Location: Aurora, CO Clearance: Active TS/SCI with CI Polygraph required Certification: IAT Level II / Security+ required Role Summary Seeking a Principal Software Engineer to support the enhancement, modification, troubleshooting, and sustainment of existing software systems. This role supports software architecture, development, testing, deployment, and system maintenance in a Linux-based environment. The engineer will work across the full software development lifecycle, troubleshoot system anomalies, coordinate software upgrades, and develop technical solutions for complex software, configuration, network, and operating system issues. Key Responsibilities * Develop enhancements and modifications for existing software systems. * Troubleshoot anomalies related to software, system configuration, network interfaces, and operating system issues. * Coordinate software installs and upgrades in accordance with Configuration Management procedures. * Support software architecture design, development, integration, and testing. * Perform full lifecycle software development, including requirements definition, design, implementation, testing, deployment, and sustainment. * Develop and maintain system tools, technical documentation, and support materials. * Provide technical solutions for complex software and system-level issues. * Support containerized software deployments and integration activities. * Collaborate with developers, engineers, customers, and technical stakeholders in a team environment. Required Qualifications * 8+ years of object-oriented software development experience. * Active TS/SCI with CI Polygraph required at start. * Current IAT Level II / Security+ certification required. * Java development experience in a Linux environment. * Experience with Jenkins. * Experience with Java Messaging Service. * Experience deploying software within Docker containers. * Experience with NetBeans. * Experience with JavaScript. * Experience troubleshooting software, configuration, network interface, and operating system issues. * Experience coordinating software installs, upgrades, and releases under Configuration Management processes. * Ability to support requirements definition and full SDLC execution. * Ability to develop technical solutions for complex software problems. Preferred Qualifications * Experience with web-based development. * Experience with web services. * Strong communication skills with the ability to work directly with customers and technical teams. * Experience supporting classified, mission-critical, or operational software environments. * Experience with system sustainment, software modernization, or enhancement of existing software baselines. #cj