> Markdown version of [/jobs/ext/3868411-senior-software-engineer-in-manassas](https://www.wearedevelopers.com/jobs/ext/3868411-senior-software-engineer-in-manassas). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer in Manassas - **Company:** Energy Jobline - **Location:** Manassas, VA, United States (Remote available) - **Experience:** Expert - **Salary:** $107,900.0 - $195,050.0 - **Contract:** Permanent contract - **Skills:** HTML, JavaScript (Programming Language), Agile Methodology, Amazon Web Services, Amazon Cloudfront, Amazon S3, IOS Applications, Apple IOS, Apple Xcode, Application Integration Architecture, Application Performance Management, JIRA, Automation of Tests, Cascading Style Sheets (CSS), Cloud Computing, Code Review, System Configuration, Data Integrity, Relational Databases, Software Debugging, Django Web Framework, Enterprise Content Management, HP Systems Insight Manager, Mobile Application Software, Python (Programming Language), PostgreSQL, Performance Tuning, Scrum Methodology, Release Management, Next.js, Secure Coding, Software Engineering, Systems Integration, Uikit, Load Balancing, Cloud Platform System, ReactJS, Swiftui, Caching, Swift (Programming Language), Backend, AWS ECS, Gitlab, Git, Cloudformation, Amazon Relational Database Service, Pytest, Gitlab-ci, Kubernetes, Infrastructure Automation Frameworks, Information Technology, Playwright, Atlassian Tools, Front End Software Development, Restful APIs, Terraform, Multiplatform, Software Version Control, Devsecops, Docker - **Published:** October 22, 2026 - **Apply:** https://www.energyjobline.com/job/senior-software-engineer-manassas-32023536 ## About the Role n · US citizenship is required per contract. \n · 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. \n Active Top Secret/SCI with the ability to successfully pass a Polygraph examination. \n · 5+ years of hands-on experience designing, developing, and maintaining modern web and mobile applications. \n · 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. \n · Experience with Wagtail CMS or comparable content management frameworks and PostgreSQL or similar relational databases. \n · Experience developing cross-platform mobile applications using React and iOS applications using Swift, SwiftUI, UIKit, Xcode, and iOS SDKs. \n · Experience developing, deploying, and maintaining applications in AWS, including familiarity with S3, ECS, RDS, CloudFront, and Application Load Balancers (ALB). \n · Experience with Docker, Git-based source control, GitLab, and CI/CD development and deployment practices. \n · Familiarity with Kubernetes and container orchestration concepts, including deploying, managing, and scaling containerized applications in cloud environments. \n · Demonstrated experience working in an Agile/Scrum environment, including facilitating Scrum ceremonies, supporting sprint execution, removing impediments, and contributing hands-on software development. \n · Experience using Jira or comparable Agile project management tools to manage backlogs, user stories, defects, and sprint progress. \n · Strong understanding of secure coding, automated testing, code reviews, software integration, and troubleshooting across full-stack applications. \n · Excellent communication, problem-solving, and collaboration skills, with the ability to work effectively with Product Owners, developers, and customer stakeholders., n · Experience supporting software development programs within the DoD or IC. \n · Certified Scrum Master (CSM), Professional Scrum Master (PSM), SAFe Scrum Master (SSM), or equivalent Agile certification. \n · Experience serving as a Scrum Master or Agile technical lead, using Agile metrics to improve sprint execution, team performance, and software delivery. \n · Experience mentoring developers, conducting technical reviews, and collaborating directly with government customers in mission-critical environments. \n · Advanced experience with Next.js, React.js, Django REST Framework, Wagtail CMS, and PostgreSQL, including performance optimization and complex application integrations. \n · Experience developing, deploying, and maintaining iOS applications using Swift, SwiftUI, UIKit, and Xcode, including application signing, provisioning, debugging, and release management. \n · Experience integrating React with iOS components and developing mobile applications for both iOS and Android. \n · Experience configuring and optimizing AWS ECS, S3, RDS, CloudFront, and ALB, including container orchestration, caching, security, and application performance. \n · Experience with GitLab CI/CD, infrastructure-as-code tools such as Terraform or CloudFormation, and automated testing frameworks such as Playwright, Jest, or Pytest. \n · Experience developing secure, accessible, high-availability public-facing applications and enterprise content management solutions. ## Description 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 security objectives., · 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 and iOS applications using Swift, SwiftUI, UIKit, Xcode, and Apple iOS SDKs, ensuring seamless integration with backend services., · Develop, deploy, and maintain secure, scalable applications within Amazon Web Services (AWS). \n · Collaborate with DevSecOps engineers to support CI/CD pipelines, Docker deployments, cloud infrastructure, and application monitoring. \n · Troubleshoot application and infrastructure issues while ensuring performance, reliability, and compliance with customer security requirements. \n \n Agile Delivery & Scrum Facilitation \n · Serve as a hands-on software engineer while facilitating Scrum ceremonies, including sprint planning, daily standups, backlog refinement, sprint reviews, and retrospectives. \n · Partner with Product Owners, developers, and customer stakeholders to establish sprint goals, prioritize work, and align software delivery with mission requirements. \n · Identify and remove team-level impediments, manage technical dependencies, and address risks impacting sprint execution and delivery commitments. \n · Champion Agile best practices, team collaboration, accountability, and continuous improvement while actively contributing to software development. \n · Leverage Jira for sprint and backlog management, GitLab for source control and collaborative development, and Rocket.Chat for customer and team communication.