Senior Software Engineer

Help deliver the digital capabilities that connect the Intelligence Community with critical information, enable secure access to mission-essential services, and ensure users have reliable technology when it matters most.

Leidos is seeking an innovative, hands-on Senior Software Engineer to support the Chinook program supporting an Intelligence Community (IC) customer. This hybrid opportunity offers a combination of onsite collaboration and remote work, providing the flexibility to work independently while partnering closely with engineering teams and customer stakeholders to deliver impactful solutions. In this role, you'll help design, build, and enhance modern web and mobile applications that provide users with reliable access to information and services supporting national security objectives.

This is a unique opportunity to combine hands-on full-stack software engineering with Agile team leadership. You'll develop modern, responsive user experiences using Next.js, React.js, JavaScript, and CSS, build scalable backend services using Python, Django, Wagtail, and PostgreSQL, and develop mobile applications using React Native and native iOS technologies. You'll also leverage Amazon Web Services (AWS) to deliver secure, scalable, cloud-hosted solutions.

Beyond writing code, you'll help drive the team's success by facilitating Scrum ceremonies, supporting sprint execution, removing team-level impediments, and promoting continuous improvement. Working closely with developers, Product Owners, and customer stakeholders, you'll help ensure the team delivers high-quality software while maintaining a collaborative, mission-focused Agile environment.

If you're a skilled full-stack engineer who enjoys solving complex technical challenges, leading through collaboration, and seeing your code make a meaningful impact on national security missions, we want you on our team.

Position may be performed in the following locations below. Please note Gaithersburg, MD is the program’s primary work location.

• Gaithersburg, MD
• Alexandria, VA
• Chantilly, VA
• Tucson, AZ

Clearance Level Required:

Active Top Secret/SCI with the ability to successfully pass a Polygraph examination.

Primary Responsibilities:

Full-Stack Software Development

· Design, develop, test, and maintain scalable, secure web and mobile applications supporting mission-critical customer requirements.

· Build responsive front-end applications using Next.js, React.js, JavaScript, and CSS, and develop backend services and RESTful APIs using Python and Django.

· Develop and maintain content management solutions using Wagtail CMS and optimize PostgreSQL databases for performance and data integrity.

· Develop and support cross-platform mobile applications using React Native and native iOS applications using Swift, SwiftUI, UIKit, Xcode, and Apple iOS SDKs, ensuring seamless integration with backend services.

· Write clean, maintainable code; conduct peer reviews; troubleshoot complex issues; and implement unit, integration, and automated testing.

AWS Cloud Development & Deployment

· Develop, deploy, and maintain secure, scalable applications within Amazon Web Services (AWS).

· Collaborate with DevSecOps engineers to support CI/CD pipelines, Docker deployments, cloud infrastructure, and application monitoring.

· Troubleshoot application and infrastructure issues while ensuring performance, reliability, and compliance with customer security requirements.

Agile Delivery & Scrum Facilitation

· Serve as a hands-on software engineer while facilitating Scrum ceremonies, including sprint planning, daily standups, backlog refinement, sprint reviews, and retrospectives.

· Partner with Product Owners, developers, and customer stakeholders to establish sprint goals, prioritize work, and align software delivery with mission requirements.

· Identify and remove team-level impediments, manage technical dependencies, and address risks impacting sprint execution and delivery commitments.

· Champion Agile best practices, team collaboration, accountability, and continuous improvement while actively contributing to software development.

· Leverage Jira for sprint and backlog management, GitLab for source control and collaborative development, and Rocket.Chat for customer and team communication.

Basic Qualifications:

· US citizenship is required per contract.

· Bachelor's degree in Computer Science, Software Engineering, or related field and 8-12 years of prior relevant experience or Master’s with 6-10 years of prior relevant experience. May possess a Doctorate in technical domain. Equivalent experience may be considered in lieu of degree.

Active Top Secret/SCI with the ability to successfully pass a Polygraph examination.

· 5+ years of hands-on experience designing, developing, and maintaining modern web and mobile applications.

· Strong proficiency in JavaScript, React.js, Next.js, HTML, and CSS for front-end development and Python and Django for backend services and RESTful APIs.

· Experience with Wagtail CMS or comparable content management frameworks and PostgreSQL or similar relational databases.

· Experience developing cross-platform mobile applications using React Native and native iOS applications using Swift, SwiftUI, UIKit, Xcode, and iOS SDKs.

· Experience developing, deploying, and maintaining applications in AWS, including familiarity with S3, ECS, RDS, CloudFront, and Application Load Balancers (ALB).

· Experience with Docker, Git-based source control, GitLab, and CI/CD development and deployment practices.

· Familiarity with Kubernetes and container orchestration concepts, including deploying, managing, and scaling containerized applications in cloud environments.

· Demonstrated experience working in an Agile/Scrum environment, including facilitating Scrum ceremonies, supporting sprint execution, removing impediments, and contributing hands-on software development.

· Experience using Jira or comparable Agile project management tools to manage backlogs, user stories, defects, and sprint progress.

· Strong understanding of secure coding, automated testing, code reviews, software integration, and troubleshooting across full-stack applications.

· Excellent communication, problem-solving, and collaboration skills, with the ability to work effectively with Product Owners, developers, and customer stakeholders.

Preferred Qualifications:

· Experience supporting software development programs within the DoD or IC.

· Certified Scrum Master (CSM), Professional Scrum Master (PSM), SAFe Scrum Master (SSM), or equivalent Agile certification.

· Experience serving as a Scrum Master or Agile technical lead, using Agile metrics to improve sprint execution, team performance, and software delivery.

· Experience mentoring developers, conducting technical reviews, and collaborating directly with government customers in mission-critical environments.

· Advanced experience with Next.js, React.js, Django REST Framework, Wagtail CMS, and PostgreSQL, including performance optimization and complex application integrations.

· Experience developing, deploying, and maintaining native iOS applications using Swift, SwiftUI, UIKit, and Xcode, including application signing, provisioning, debugging, and release management.

· Experience integrating React Native with native iOS components and developing mobile applications for both iOS and Android.

· Experience configuring and optimizing AWS ECS, S3, RDS, CloudFront, and ALB, including container orchestration, caching, security, and application performance.

· Experience with GitLab CI/CD, infrastructure-as-code tools such as Terraform or CloudFormation, and automated testing frameworks such as Playwright, Jest, or Pytest.

· Experience developing secure, accessible, high-availability public-facing applications and enterprise content management solutions.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting:

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:

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.