# Senior Software Engineer — Secure Mission Systems at Rackner

> Remote · region unclear · Senior · Software engineering · open. Source: https://alderhq.app/jobs/greenhouse%3Arackner%3A4717768005 (read 2026-11-04).

## Facts (observed)

- Company: [Rackner](https://alderhq.app/companies/rackner)
- Location text: Remote
- Where it can be done from (inferred): Remote · region unclear (evidence: "Remote, region not stated")
- Posted: 2026-07-23 (105 days ago)
- First seen by alder: 2026-11-02 · last verified: 2026-11-04
- Reposted: 0 times · edited: 0 times
- Apply on the employer's site: https://job-boards.greenhouse.io/rackner/jobs/4717768005
- Skills listed (inferred): Kubernetes, Docker, LLMs

## Pay and sponsorship

- Posted pay: not posted

## Description (the employer's text)

### 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

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Data: alder (https://alderhq.app). Cite https://alderhq.app/jobs/greenhouse%3Arackner%3A4717768005 and the date you read it. Observed facts come from the employer's own listing; location reach, level, family and skills are inferences.