Rackner - Backend Software Engineer — Secure Mission Systems
Requirements
• At least four years of professional software-development experience. • A bachelor’s degree in computer science or a related field. • Hands-on experience building backend services, APIs, or distributed applications. • Experience with Python, C#, or a comparable backend language. • Understanding of API design, data flows, error handling, automated testing, and source control. • Familiarity with secure software-development lifecycle practices. • Ability to clearly explain the systems you personally built, the decisions you made, and how your work was tested and delivered. • FastAPI or another Python web framework. • RabbitMQ, Celery, gRPC, or similar messaging and service-integration tools. • OpenShift, Kubernetes, GitLab CI/CD, or secure container delivery. • Defense, mission-planning, decision-support, or other regulated software environments. • Integration of backend services with LLM, retrieval-augmented generation, or other AI-enabled components. • You do not need to be the deepest expert in every technology listed. Strong backend fundamentals, credible hands-on experience, and the ability to learn within a secure delivery environment matter most.
Responsibilities
• Design, build, test, and integrate secure backend services and APIs using Python and/or C#. • Develop REST services with FastAPI and support service-to-service communication through technologies such as gRPC. • Build reliable asynchronous workflows using Celery, RabbitMQ, or comparable messaging tools. • Develop and integrate relational and geospatial data solutions using PostgreSQL and PostGIS. • Containerize and deploy services through OpenShift or Kubernetes. • Write unit and integration tests that strengthen software quality and delivery confidence. • Work within GitLab-based development and CI/CD workflows. • Investigate defects, security findings, failed integrations, and service issues. • Participate in code reviews, technical reviews, and vulnerability-remediation efforts. • Produce clear software designs, workflow descriptions, and technical documentation. • Collaborate with frontend, AI/ML, cybersecurity, DevSecOps, and customer engineering teams.
Benefits
• At Rackner, you will build technology that supports critical defense and public-sector missions. • This role offers broader ownership across backend engineering, secure delivery, distributed services, automated testing, and collaboration with software, AI/ML, cloud, and cybersecurity teams. • Rackner has delivered more than $30 million in recent federal awards. We are looking for an engineer who can help turn complex mission needs into secure, dependable software. • Competitive compensation • Company-supported certifications • 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 growth opportunities • If you want to build secure backend services that directly support an important defense mission, we would like to hear from you.
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