Senior Software Engineer — Secure Mission Systems

Rackner is seeking a Senior Software Engineer to design, build, test, and deliver secure mission-planning and decision-support software for a Department of Defense customer.

This role gives you broader ownership than a traditional feature-development position. You will contribute across application engineering, secure CI/CD, containerized deployment, automated testing, cybersecurity remediation, and AI-capability integration. You will work alongside experienced technical teams and help move complex software from design through secure delivery.

This position is contingent upon contract award and final customer approval.

• →Design, develop, test, and integrate new software capabilities.
• →Build and maintain secure CI/CD workflows using GitLab and related development systems.
• →Support containerized application deployment through OpenShift and Kubernetes.
• →Apply secure software-development lifecycle practices throughout delivery.
• →Integrate AI models and support capabilities involving LLM assistants, retrieval-augmented generation, and agentic AI.
• →Develop unit, integration, and system-level tests.
• →Use automated security tools such as Fortify, JFrog Xray, and OWASP ZAP.
• →Investigate vulnerabilities and support cybersecurity remediation.
• →Participate in code reviews, technical reviews, and solution-design discussions.
• →Create software-design documents, sequence diagrams, workflow descriptions, and test reports.
• →Communicate progress, blockers, risks, and schedule concerns to technical and program stakeholders.
• →Collaborate with customer technical leads in remote and onsite settings.

• →Bachelor’s degree in Computer Science or a related field
• →10+ years of software engineering experience, including hands-on design, development, testing, or integration work
• →Hands-on experience with CI/CD, Kubernetes, GitLab, and OpenShift
• →Strong understanding of secure software-development lifecycle practices
• →Experience using Fortify and/or JFrog Xray for automated security scanning and vulnerability remediation
• →Integrating AI models or AI-enabled capabilities into software applications
• →Building automated unit and integration tests
• →Clear technical documentation and stakeholder communication skills

• OWASP ZAP or comparable application-security testing tools.
• Artifactory or similar artifact-management platforms.
• LLM assistants, retrieval-augmented generation, or agentic-AI components.
• Jira, Confluence, and Slack in a structured development environment.
• Software delivery supporting defense, national-security, or other regulated missions.
• Customer-provided development systems and secure internal networks.

At Rackner, you will have the opportunity to build technology that supports critical defense and public-sector missions.

You will work on more than isolated coding tickets or pipeline tasks. This role brings together hands-on application development, secure software delivery, container platforms, automated testing, cybersecurity, and emerging AI capabilities.

Rackner has delivered more than $30 million in recent federal awards and supports mission-critical work across defense, civilian, and public-sector environments. We are looking for a senior software engineer who can help build on that momentum by delivering reliable software, strengthening security, and helping teams move complex mission capabilities forward.

If you are a senior software engineer who wants broader ownership across secure application development, container platforms, DevSecOps, software assurance, and AI integration, we would like to hear from you.