Mid-Level Backend Software Engineer

Fairygodboss; Gaithersburg (MD); On-site; USD 87,100 - 157,450; Full time

Benefits offered by this job

Health and Wellness programs

Paid Leave

Retirement

Job summary

A technology company in Gaithersburg, MD is seeking a Backend Software Engineer to support a high-visibility, data-driven application. You will be responsible for backend development, including creating RESTful APIs and collaborating on data systems. Candidates should have a degree in computer science and experience in Java or Python. The role offers potential for significant impact and career growth in a mission-driven environment. Pay range is between $87,100 and $157,450.

Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, or a related field with 4–8 years of experience.
• US Citizenship and active TS/SCI clearance.
• Professional experience developing object-oriented applications in Java or Python.

Responsibilities

• Design, develop, test, and maintain backend application components using Java or Python.
• Develop and maintain RESTful services to support application functionality.
• Collaborate with teams to understand data sources and integrate backend systems.

Skills

Object-oriented programming

Backend development

RESTful API development

SQL

Linux environments

Education

Bachelor's degree in Computer Science or related field

Master's degree in a relevant field

Tools

Java

Python

SQL databases

Apache Airflow

Spring Boot

Job description

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.

We’re hiring a Backend Software Engineer to support a high‑visibility, data‑driven application used across the organization for analytics and reporting. You’ll help build and maintain core backend services, develop RESTful APIs, support data‑driven functionality, and contribute to ongoing system enhancements within a Linux‑based environment. Your work will directly support system reliability, performance, and data accuracy for mission stakeholders. Our primary development team operates out of Gaithersburg, MD, but we also support onsite engineers in Alexandria, VA; Chantilly, VA; Aurora, CO; St. Louis, MO; and Tucson, AZ, giving top talent multiple paths to join the mission.

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 withApache Airflow or similar workflow orchestration technologies
• Experience withSpring Boot, Django, or similar backend frameworks
• Exposure toCI/CD pipelines (GitLab, Jenkins, etc.)
• Familiarity withcontainerization (Docker, OpenShift)
• Exposure tocloud environments (AWS or Azure)
• Experience working inAgile development environments

Original Posting

April 16, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range

Pay Range $87,100.00 - $157,450.00

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

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.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.

REQNUMBER: R-00181100