Senior Software Engineer

Leidos is seeking a Senior Software Engineer (hybrid) to support the Chinook program for an Intelligence Community customer. The role focuses on building secure, mission-critical web and mobile applications using modern full-stack technologies and AWS, with hands-on participation in an Agile delivery process.

Role Overview

As a hands-on engineer, you will design and maintain scalable systems that meet customer security requirements. You will deliver responsive front-end experiences, backend services and RESTful APIs, content management capabilities, and cross-platform mobile functionality, while collaborating in Scrum ceremonies and working with Product Owners, developers, and customer stakeholders.

Responsibilities

• Design, develop, test, and maintain scalable, secure web and mobile applications aligned to 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.
• Support cross-platform mobile development using React Native and native iOS development using Swift, SwiftUI, UIKit, Xcode, and Apple iOS SDKs, ensuring seamless backend integration.
• Write clean, maintainable code; perform peer reviews; troubleshoot complex issues; and implement unit, integration, and automated testing.
• 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 maintaining performance, reliability, and compliance with customer security requirements.
• Facilitate Scrum ceremonies including sprint planning, daily standups, backlog refinement, sprint reviews, and retrospectives while actively contributing to software delivery.
• Partner with Product Owners, developers, and customer stakeholders to establish sprint goals, prioritize work, and align delivery with mission requirements.
• Identify and remove team-level impediments, manage technical dependencies, and address risks impacting sprint execution and delivery commitments.
• Use Jira for sprint and backlog management, GitLab for source control and collaborative development, and Rocket.Chat for customer and team communication.

Required Qualifications

• US citizenship is required per contract.
• Bachelor’s degree in Computer Science, Software Engineering, or related field with 8-12 years of prior relevant experience, or Master’s degree with 6-10 years of prior relevant experience.
• 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 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.

Technologies

Next.js, React.js, JavaScript, CSS, HTML, Python, Django, Wagtail CMS, PostgreSQL, React Native, Swift, SwiftUI, UIKit, Xcode, Apple iOS SDKs, AWS, RESTful APIs, Docker, CI/CD pipelines, Jira, GitLab, Rocket.Chat, Scrum, Git, Kubernetes, S3, ECS, RDS, CloudFront, Application Load Balancers (ALB), unit, integration, and automated testing, DevSecOps, Scrum ceremonies.

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.

Location and Schedule

Alexandria, VA (hybrid). The position may also be performed in Gaithersburg, MD, Chantilly, VA, and Tucson, AZ.

Compensation

USD 107,900 - 195,050 per year.

Education

Bachelor’s degree in Computer Science, Software Engineering, or related field.

Clearance

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

Benefits

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