Senior Software Engineer

Hybrid Senior Software Engineer role in Tucson, AZ supporting Leidos’ Chinook program for an Intelligence Community (IC) customer. You will design, build, and modernize web, mobile, and backend capabilities in a secure Agile environment, with clear ownership across the full delivery lifecycle.

What you’ll work on

• Design, develop, test, and maintain scalable, secure web and mobile applications for mission-critical requirements.
• Build responsive front ends with 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 for performance and data integrity.
• Support cross-platform mobile development using React Native, and build native iOS experiences using Swift, SwiftUI, UIKit, Xcode, and Apple iOS SDKs, ensuring smooth integration with backend services.
• Write clean, maintainable code, perform peer reviews, troubleshoot complex issues, and implement unit, integration, and automated testing.
• Develop, deploy, and maintain secure, scalable applications on AWS.
• Partner with DevSecOps to support CI/CD pipelines, Docker deployments, cloud infrastructure, and application monitoring.
• Troubleshoot application and infrastructure issues while meeting performance, reliability, and customer security requirements.
• Serve as a hands-on engineer and facilitate Scrum delivery through sprint planning, daily standups, backlog refinement, sprint reviews, and retrospectives.
• Coordinate with Product Owners, developers, and customer stakeholders to define sprint goals, prioritize work, and align delivery with mission needs.
• Identify and remove team-level impediments, manage technical dependencies, and address risks affecting sprint execution.
• Use Jira for sprint and backlog management, GitLab for source control and collaborative development, and Rocket.Chat for customer and team communication.

Clearance and eligibility

• US citizenship required per contract.
• Active Top Secret/SCI with the ability to successfully pass a Polygraph examination.

Required qualifications

• 5+ years of hands-on experience designing, developing, and maintaining modern web and mobile applications.
• Bachelor’s degree in Computer Science, Software Engineering, or related field, plus 8-12 years of prior relevant experience. Master’s with 6-10 years may be considered. Doctorate in the technical domain may be available. Equivalent experience may be considered in lieu of degree.
• 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 frameworks) and PostgreSQL (or similar relational databases).
• Experience developing cross-platform mobile applications with React Native and native iOS applications using Swift, SwiftUI, UIKit, Xcode, and iOS SDKs.
• Experience developing 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 Agile/Scrum experience, including facilitating Scrum ceremonies, supporting sprint execution, removing impediments, and contributing hands-on development.
• Experience using Jira (or comparable 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 with Product Owners, developers, and customer stakeholders.

Health, time, and protection

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

Compensation and location

• Pay range: USD 107,900 - 195,050 per year
• Location: Tucson, AZ (hybrid)
• Other possible work locations: Gaithersburg, MD; Alexandria, VA; Chantilly, VA; Tucson, AZ

Key technologies

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

Preferred qualifications

• Experience supporting software development programs within the DoD or IC.
• CSM, PSM, 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.

Original posting date: October 19, 2026