Mid/Senior Software Engineer (TS/SCI)/(Remote)

Company Description AstroNetix is a veteran-owned company delivering mission-focused solutions across national security, defense, and space domains. Our team brings deep operational and technical experience supporting software-intensive mission systems where reliability, correctness, and security are critical. We partner with U.S. government and defense organizations to design, integrate, and operate command and control systems that perform under real-world mission conditions. Role Description AstroNetix is seeking an experienced Senior Backend Software Engineer with mandatory OpenC3 COSMOS expertise to support space and mission command and control systems . This role focuses on backend development, integration, and operational hardening of COSMOS-based command and telemetry systems used in national security environments. The successful candidate will work closely with systems engineers, operators, and security teams to ensure reliable, secure command execution and telemetry flow across distributed mission systems. Responsibilities include configuring and extending OpenC3 COSMOS, developing and integrating backend services (primarily Java Spring Boot ), defining and maintaining command and telemetry schemas, and implementing DevSecOps practices to support secure, resilient operations. The role also involves integrating COSMOS with mission analysis tools, orchestration frameworks, and AI-enabled backend services. Qualifications Hands-on, production experience with OpenC3 COSMOS (required) Backend software engineering experience building Java Spring Boot services Strong experience with DevSecOps practices , including CI/CD pipelines, containerization, and secure deployments Experience with command and telemetry systems or mission control software Familiarity with message-driven or distributed system architectures Experience integrating backend systems with mission tools or frameworks (e.g., FreeFlyer, Meridian, or similar systems) Experience supporting or integrating AI-enabled backend services or analytics pipelines Ability to support mission-critical systems with a focus on correctness, reliability, and security U.S. citizenship required Active TS/SCI required