Backend Software Engineer

Overview

If you’ve spent the last few years building your expertise in backend engineering, Java or Python development, and mission‑driven systems, and you’re ready for work that actually moves the needle, this is the kind of opportunity cleared engineers pursue when they want real impact. If you take pride in your craft, write your own résumé, and deliver results that senior leaders actually see, you’ll thrive here.

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.

• Design, develop, test, and maintain backend services using Java or Python
• Design and implement RESTful services to support application functionality and integrations
• Apply strong object‑oriented design principles to build scalable and maintainable systems
• Write and optimize SQL queries to support application functionality and performance
• Coordinate with external teams to understand data sources, interfaces, and access patterns, and translate requirements into backend integrations
• Participate in technical design discussions and contribute to backend architecture decisions
• Develop, deploy, and troubleshoot applications within Linux‑based environments
• Diagnose and resolve issues across application and database layers
• 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

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.