Mid-Level Backend Software Engineer

Mid-Level Backend Software Engineer at Leidos, onsite in Tucson, AZ, focused on building and maintaining backend services, REST APIs, and data-driven functionality in a Linux environment, with the primary team in Gaithersburg, MD and onsite support in several other cities.

Responsibilities

• Backend Development: Design, implement, test, and maintain backend components using Java or Python
• REST API Development: Create and sustain RESTful services to enable application features and system integrations
• Object-Oriented Programming: Apply object-oriented design principles to build scalable, maintainable systems
• Database Development: Create and modify SQL queries to support application functionality and data retrieval
• Data Source Collaboration: Partner with internal and external teams to understand data sources, formats, and access methods, supporting backend integration
• Linux Environments: Develop and troubleshoot applications in Linux-based environments
• Data Processing & Business Logic: Implement backend logic for data transformation, processing, and workflow execution
• Bug Fixing & Enhancements: Identify and resolve defects and performance issues; implement enhancements
• Code Quality: Adhere to coding standards, participate in code reviews, and document software

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
• US Citizenship
• Active TS/SCI 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 experience with SQL capability, 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
• RESTful APIs
• SQL
• Linux
• Apache Airflow
• Spring Boot
• Django
• GitLab
• Jenkins
• Docker
• OpenShift
• AWS
• Azure

Compensation

• Salary: USD 87,100 - 157,450 per yearly

Benefits

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

Why this role stands out

• High Impact: Your work supports a widely used application that drives real-time decision-making
• High Visibility: Collaborate with engineering teams and mission stakeholders across programs
• Career Growth: Build deeper expertise in backend development, API design, and scalable systems
• Challenging Work: Contribute to complex backend features, not routine maintenance tasks