Mid-Level Backend Software Engineer

Leidos is seeking a Mid-Level Backend Software Engineer to design, develop, and maintain backend components and RESTful services in a Linux environment to support mission-critical analytics. The role involves collaborating with data sources and stakeholders across programs and locations, and is based onsite in Alexandria, VA.

Responsibilities

• Design, implement, test, and maintain backend components using Java or Python.
• Develop and sustain RESTful services to support application functionality and system integrations.
• Apply object-oriented design principles to build scalable, maintainable systems.
• Write and optimize SQL queries to support data retrieval and application functionality.
• Collaborate with internal and external teams to understand data sources, formats, and access methods and support backend integration.
• Develop and troubleshoot applications within Linux-based environments.
• Implement backend logic for data transformation, processing, and system workflows.
• Identify, debug, and resolve application defects and performance issues.
• Adhere to coding standards, participate in code reviews, and contribute to documentation efforts.

Requirements

• Bachelor's degree in Computer Science, Software Engineering, or a related field.
• Bachelor's degree in Computer Science, Software Engineering, or a related field with 4–8 years of experience.
• Master's degree with 2–6 years of experience.
• U.S. Citizenship.
• Active TS/SCI clearance with the ability to pass a polygraph.
• Professional experience developing object-oriented applications in Java or Python.
• Hands-on experience building and maintaining RESTful APIs.
• Basic to moderate SQL experience, including writing queries and working with relational databases.
• Working knowledge of Linux-based environments.
• Ability to work independently on defined tasks within established technical frameworks and deliver reliable results.

Technologies

• Java
• Python
• SQL
• Linux
• Apache Airflow
• Spring Boot
• Django
• Docker
• OpenShift
• GitLab
• Jenkins
• AWS
• Azure

Benefits

• Competitive compensation
• Health and Wellness programs
• Income protection
• Paid leave
• Retirement benefits