Senior Software Engineer — Secure Mission Systems

Job description

**Senior Software Engineer — Secure Mission Systems** **Location:** Mainly remote, with onsite work in Laurel, Maryland, typically one day approximately every six weeks for team-wide sprint planning **Clearance:** Active final DoD Secret clearance required **Build Secure Software for High-Impact Defense Missions** 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. **What You Will Do** - 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. **What You Will Bring** - 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 **Helpful Experience** - 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. **Why Rackner** 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. **Benefits & Professional Growth** - Competitive compensation - Company-supported certifications aligned with current and future program work - 401(k) with 100% company match up to 6% - Medical, dental, vision, life, and disability coverage - Paid time off and company holidays - Remote-work support and home-office equipment plan - Fitness and wellness reimbursement - Weekly pay schedule - Professional-development and future growth opportunities **Apply** 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.