Backend Software Engineer

We’re hiring a Backend Software Engineer to support a high‑visibility application relied on across the organization for data analysis, reporting, and operational decision‑making. You’ll design and build scalable backend services, develop RESTful APIs, integrate complex data sources, and ensure system reliability and performance in a Linux‑based environment.

Our primary development team operates out of Gaithersburg, MD
, but we also support onsite engineers in Alexandria, VA;
Chantilly, VA;
Aurora, CO;
St. Louis, MO; and Tucson, AZ
.

• High Impact:
  Your services power a widely used application that drives real‑time decisions
• High Visibility:
  Collaborate directly with engineering teams and mission stakeholders
• Career Growth:
  Deepen your expertise in backend architecture, API design, and scalable systems
• Challenging Work:
  Build and optimize complex backend features

• Backend Development:
  Design, develop, test, and maintain backend services using Java or Python
• REST API Development:
  Design and implement RESTful services to support application functionality and integrations
• Object‑Oriented Design:
  Apply strong object‑oriented design principles to build scalable and maintainable systems
• Database Development:
  Write and optimize SQL queries to support application functionality and performance
  
  Data Source Integration Coordination:
  Coordinate with external teams to understand data sources, interfaces, and access patterns, and translate requirements into backend integrations
• System Design Contribution:
  Participate in technical design discussions and contribute to backend architecture decisions
• Linux Environments:
  Develop, deploy, and troubleshoot applications within Linux‑based environments
• System Troubleshooting:
  Diagnose and resolve issues across application and database layers
• Code Quality & Best Practices:
  Participate in code reviews and ensure adherence to engineering standards

• Bachelor’s degree in Computer Science, Software Engineering, or a related field with 8–12 years of experience; or a Master’s degree with 6–10 years of experience
• U.S. Citizenship
• Active TS/SCI clearance with the ability to successfully pass a Polygraph
• Strong professional experience developing backend applications in Java or Python
• Proven ability to design and develop RESTful APIs that support scalable application functionality
• Solid SQL experience, including writing and optimizing queries across relational databases
• Confident working in Linux‑based environments
• Ability to work independently and drive solutions to moderately complex and complex technical challenges

• Experience with Apache Airflow or similar workflow orchestration technologies
• Experience with geospatial data and querying (e.g., PostGIS)
• Experience with Spring Boot, Django, or similar backend frameworks
• Experience with CI/CD pipelines (Git Lab, Jenkins, etc.)
• Familiarity with containerization (Docker, Open Shift, Kubernetes)
• Exposure to cloud environments (AWS or Azure)
• Experience working in Agile development environments

Pay Range $ - $

Employment benefits include competitive compensation, health and wellness programs, income protection, paid leave, and retirement.

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.