Secure Backend Engineer – DoD Mission Systems (Remote)

Rackner; Laurel (MD); Hybrid; USD 110,000 - 160,000; Full time

Benefits offered by this job

Medical coverage

Dental coverage

Vision coverage

Life insurance

Disability coverage

PTO & holidays

Remote-work support

Home-office equipment plan

Certifications support

401(k) matching

Professional development

Job summary

Rackner is seeking a backend engineer to build secure APIs and backend services for a DoD program. You will own end-to-end backend components, including data flows, service integrations, and automated testing, across Python, C#, FastAPI, and gRPC.

You will work remotely across the US with periodic onsite planning in Laurel, Maryland, collaborating with AI/ML, security, and platform teams while adhering to secure delivery practices.

Qualifications

• Bachelor’s degree in Computer Science or related field.
• At least four years of professional software-development experience.
• Hands-on experience designing and developing backend services, APIs, or distributed applications.
• Developing backend software using Python and C#.
• Building APIs and services with FastAPI.
• Experience with RabbitMQ, gRPC, and Celery.
• Working with PostgreSQL and PostGIS.
• Using GitLab-based development workflows.
• Developing or deploying software in OpenShift environments.
• Understanding of secure software-development lifecycle practices.
• Writing automated unit and integration tests.
• Ability to clearly explain the systems you personally built, the technical decisions you made, and how your work was tested and delivered.
• Clear technical documentation and communication skills.

Responsibilities

• 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.

Skills

Bachelor's degree

4+ years experience

Backend design & development

Python

C#

FastAPI

RabbitMQ

gRPC

Celery

PostgreSQL

PostGIS

OpenShift

GitLab workflows

Secure SDLC

Unit & integration tests

Documentation & communication

Frontend collaboration

Education

Bachelor’s degree in Computer Science

Tools

OpenShift

GitLab

Job description

Rackner is seeking a backend engineer to build secure APIs and backend services for a DoD program. You will own end-to-end backend components, including data flows, service integrations, and automated testing, across Python, C#, FastAPI, and gRPC.

You will work remotely across the US with periodic onsite planning in Laurel, Maryland, collaborating with AI/ML, security, and platform teams while adhering to secure delivery practices.