Mid-Level Backend Software Engineer

Leidos invites applications for a Mid-Level Backend Software Engineer to design, develop, and maintain backend services and REST APIs in a Linux environment, using Java or Python to support mission-critical analytics and reporting. This onsite position is located in Aurora, Colorado, with a salary range of USD 87,100 to 157,450 per year and requires a Master’s degree along with at least two years of relevant experience.

Responsibilities

• Backend development: design, implement, test, and maintain backend components using Java or Python
• REST API development: create and sustain RESTful services to support functionality and system integrations
• Object-oriented programming: apply OO design principles to build scalable, maintainable systems
• Database development: write and modify SQL queries to support application functionality and data retrieval
• Data source collaboration: work with internal and external teams to understand data sources, formats, and access methods, and support integration into backend systems
• Linux environments: develop and troubleshoot applications within Linux-based environments
• Data processing and business logic: implement backend logic for data transformation, processing, and system workflows
• Bug fixing and enhancements: identify, debug, and resolve defects and performance issues
• Code quality: adhere to coding standards, participate in code reviews, and support documentation efforts

Requirements

• Bachelor’s degree in Computer Science, Software Engineering, or a related field with 4–8 years of experience; or a Master’s degree with 2–6 years of experience
• U.S. Citizenship
• Active TS/SCI clearance with the ability to successfully 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
• GitLab
• Jenkins
• Docker
• OpenShift
• AWS
• Azure

Benefits

• Health and Wellness programs
• Income Protection
• Paid Leave
• Retirement

Why This Role Stands Out

• High Impact: contribute to a widely used application that informs real-time decisions
• High Visibility: collaboration with engineering teams and mission stakeholders across programs
• Career Growth: deepen expertise in backend development, API design, and scalable systems
• Challenging Work: engage with complex backend features beyond routine maintenance