Mid-Level Backend Software Engineer

Leidos; United States; On-site; USD 87,100 - 157,450; Full time

Job summary

Leidos is looking for a Backend Developer who will engage in high-impact projects that support mission-driven engineering. This role involves designing, developing, and maintaining backend components primarily in Java or Python.

The ideal candidate will offer a Bachelor's degree and several years of relevant experience, alongside required security clearance. This position provides opportunities for career growth and building expertise in backend development.

Qualifications

• 4-8 years of experience in software engineering, or 2-6 years with a Master's degree.
• US Citizenship is required.
• Active TS/SCI clearance is necessary.
• Experience developing object-oriented applications in Java or Python.
• Hands-on experience building RESTful APIs.

Responsibilities

• Design, develop, test, and maintain backend application components.
• Develop and maintain RESTful services.
• Collaborate with internal teams for data source integration.
• Implement backend logic for data processing.

Skills

Backend Development

REST API Development

Object-Oriented Programming

Database Development

Linux Environments

Education

Bachelor's degree in Computer Science or related field

Tools

Java

Python

SQL

Job description

If you've been building your skills in backend development, object-oriented programming, and mission-driven engineering, and you're ready for work that actually moves the needle, this is the kind of opportunity cleared engineers pursue when they want to grow while making real impact. If you take pride in your craft, enjoy solving meaningful technical problems, and want your work to support a mission with visibility at senior levels, you'll thrive here.

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

Essential Responsibilities

• Backend Development: Design, develop, test, and maintain backend application components using Java or Python
• REST API Development: Develop and maintain RESTful services to support application functionality and system integrations
• Object-Oriented Programming: Apply object-oriented design principles to build scalable and maintainable systems
• Database Development: Write and modify SQL queries to support application functionality and data retrieval
• Data Source Collaboration: Collaborate 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 & Business Logic: Implement backend logic for data transformation, processing, and system workflows
• Bug Fixing & Enhancements: Identify, debug, and resolve application-level defects and performance issues
• Code Quality: Follow coding standards, participate in code reviews, and support documentation efforts

Basic Qualifications

• 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

Preferred Qualifications

• Experience with Apache Airflow or similar workflow orchestration technologies
• Experience with Spring Boot, Django, or similar backend frameworks
• Exposure to CI/CD pipelines (GitLab, Jenkins, etc.)
• Familiarity with containerization (Docker, OpenShift)
• Exposure to cloud environments (AWS or Azure)
• Experience working in Agile development environments

Pay Range

Pay Range $87,100.00 - $157,450.00

Commitment to Non-Discrimination

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.