Backend Software Engineer

Remote Hiring Remotely in USA Mid level Remote Hiring Remotely in USA Mid level Build, test, and integrate secure backend services and APIs for DoD mission-planning. Work on REST and gRPC services, asynchronous workflows, geospatial databases, containerized deployments, CI/CD, automated tests, and vulnerability remediation while collaborating with AI/ML, frontend, and cybersecurity teams. The summary above was generated by AI, Location: Mainly remote, with onsite sprint planning in Laurel, Maryland, approximately every six weeks Clearance: U.S. citizenship and an active final DoD Secret clearance required Anticipated Start: November 2026

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

Build Secure Software for a High-Impact Defense Mission

Join Rackner to build secure backend services that support mission-planning and decision-support capabilities for a Department of Defense customer.

You will take hands-on ownership of APIs, service integrations, data flows, and automated testing-not simply complete isolated development tickets. The role offers exposure to distributed systems, geospatial data, secure container platforms, and backend services supporting AI-enabled capabilities.

What You Will Do

• 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., As a Customer Success Manager, you will oversee repack business operations, maintain client relationships, forecast orders, and collaborate to enhance processes and client experiences.

• 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.

Experience That Will Help You Stand Out

• FastAPI or another Python web framework.
• RabbitMQ, Celery, gRPC, or similar messaging and service-integration tools.
• PostgreSQL, PostGIS, geospatial data, or mapping applications.
• 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.

• 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
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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.