Sr. Applications Software Engineer

Description Leidos has a new and exciting opportunity for a Sr. Applications Software Engineer located in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA) . This role focuses on security engineering, computer network operations, mission software, analytics, signals intelligence, and cryptographic key management. Competitive benefits include paid time off, 11 paid holidays, 401(k) with 6% company match, flexible schedules, stock purchase plans, technical upskilling, education support, and parental paid leave. Program Summary Product development includes tactical mobile development as well as enterprise web application development. The portfolio of products supports the Cybersecurity and Information Assurance domains, deploying a variety of technologies and interfacing with infrastructure to provide secure, modern solutions for the warfighter. Primary Responsibilities The successful candidate will work on a mix of web service development, full‑stack web application development, and robust persistence layers in an Agile Scrum environment. This involves using themes, epics, user stories, acceptance criteria, and other system engineering artifacts as part of an Agile team. The candidate will be an expert in secure software development principles and techniques, using software tools in cooperation with continuous integration and test automation, and understanding software components and their interface requirements. The role interfaces with software engineers, system engineers, information assurance engineers, test engineers, QA, and other project team members. Responsibilities also include setting standards and helping the team adopt test‑driven development (TDD) practices within the Leidos Agile Framework, ensuring engineering rigor on all assigned tasks, and mentoring junior software engineers. Basic Qualifications BS in Computer Science, Computer Engineering, or equivalent with 17+ years of relevant experience, or a Master’s with 15+ years of experience Active Secret Clearance (Required) Experience with web‑based technologies (HTML, CSS, JavaScript) Experience in Scrum or other Agile environments (e.g., SAFe, XP) Experience with UI/Development frameworks (e.g., AngularJS, Ionic, GWT, SmartGWT, Qt, React, Node.js) Experience with automated testing tools and concepts (Selenium, Cucumber, Gherkin, BDD) Experience with test‑driven development (TDD) Strong teamwork skills and excellent written and verbal communication DoD 8570‑approved security certification (e.g., Security+), required within 90 days of hire Preferred Qualifications Experience with web services architectures (REST, SOAP, AWS) Experience with software configuration management (e.g., Git, GitHub) Experience with continuous integration, quality, and DevOps tools (e.g., Ant, Maven, Jenkins, SonarQube, FishEye, Crucible, Gradle, JUnit) Experience with security scanning tools (HP Fortify, HP WebInspect) Experience with build scripts (e.g., Maven, Ant) Experience with mobile application development Experience with Agile management tools (e.g., VersionOne, JIRA, Rally) Experience with web server configuration (e.g., JBoss, WildFly, Tomcat) Experience with database development (e.g., Postgres, SQL Server, MySQL, SQLite, Oracle) Pay Range $154,050.00 – $278,475.00 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 qualified applicants with criminal histories consistent with relevant laws. #J-18808-Ljbffr Leidos Inc