Backend Software Engineer
Posted 23 Jul 2026
Advertised as “Backend Software Engineer — Secure Mission Systems”
BranchFactor Summary
The original posting with the fluff stripped out
- Expected experience
- 4+ yrs
- Management level
- Individual contributor
- Employment
- Remote
No salary listed for this role.
Backend Software Engineer — Secure Mission Systems
Location: Mainly remote, with onsite work in Laurel, Maryland, typically one day every six weeks for team-wide sprint planning. Exact timing may vary based on project needs.
Clearance: Active final DoD Secret clearance required
This position supports a pending contract opportunity and is contingent upon contract award, with an anticipated start in November 2026.
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, distributed workflows, and automated testing—not simply complete isolated development tickets. The role offers exposure to secure software delivery, geospatial data, containerized applications, and backend services that support AI-enabled capabilities.
This is a primarily remote role within the United States. Work will be performed using customer-provided systems, with virtual collaboration across the engineering team and periodic onsite sprint planning in Laurel, Maryland.
What You Will Do
- Design, develop, test, and integrate secure backend services and APIs.
- Build and maintain backend services using Python, FastAPI, and C#.
- Develop REST APIs and support service-to-service communication using gRPC.
- Build asynchronous and distributed workflows using RabbitMQ and Celery.
- Develop and integrate relational and geospatial data capabilities using PostgreSQL and PostGIS.
- Containerize and deploy backend services in OpenShift-based environments.
- Work within GitLab-based development and CI/CD workflows.
- Apply secure software-development lifecycle practices throughout design, implementation, testing, and remediation.
- Develop unit, integration, and system-level tests that support software quality and delivery confidence.
- Investigate defects, failed integrations, security findings, and service issues.
- Participate in code reviews, technical reviews, vulnerability-remediation efforts, and solution-design discussions.
- Produce software designs, sequence diagrams, workflow descriptions, and technical documentation.
- Collaborate with frontend, AI/ML, security, platform, DevSecOps, and customer engineering teams.
What You Bring