Full Description

The Homeland Security Sector at Leidos has a dynamic opportunity for an experienced Software Test Engineer to join an established, high-performing team delivering mission-critical capabilities of international importance in San Diego, CA. In this role, you will contribute to the next evolution of a critical NATO application, including rehosting and verification of an existing system onto new hardware, as well as development and test of a modernized React front-end user interface with a Java-based backend. Development activities follow Agile Scrum methodologies, emphasizing collaboration, quality, and continuous delivery. You will work in a collaborative engineering culture that supports professional growth and career advancement while delivering meaningful impact to defense operations. Primary Responsibilities: Collaborate with cross-functional Agile Scrum teams to ensure delivery of high-quality software solutions. Analyze system and capability requirements to ensure implementations are verifiable and testable. Support definition and refinement of acceptance criteria within user stories. Develop, execute, and maintain test plans, test cases, and test procedures for both: Existing system capabilities under maintenance Newly developed React front-end and Java backend services Perform regression testing based on analysis of newly implemented features and system impacts. Analyze test results, document findings, create and track defects, and contribute to test reports and metrics. Trace test cases to capability requirements to ensure full requirement coverage and validation. Support the Independent Test Manager in development and execution of formal test procedures. Participate in sprint planning, sprint reviews, and technical discussions. Develop domain knowledge of the NATO mission environment to effectively contribute to system validation efforts. Potentially support installation and user acceptance testing activities at the customer site in Belgium. Basic Qualifications (Required): U.S. Citizenship required. Active DoD Secret security clearance required to start, with ability to obtain and maintain DoD Top Secret security clearance. Bachelor’s degree in Software Engineering, Computer Science, or related technical field and 4–8 years of relevant experience, or Master’s degree with 2–6 years of relevant experience. Experience developing test plans, designing and writing test cases, executing tests, analyzing results, tracking defects, and contributing to test metrics and reports. Experience tracing test cases to system and capability requirements. Ability to determine appropriate regression test scope based on new feature implementation. Experience working across multiple test environments. Strong written and verbal communication skills. Demonstrated ability to work independently while contributing to team objectives. Ability to quickly learn complex systems and adapt to evolving priorities. Preferred Qualifications: Experience testing web-based applications. Experience with React front-end and Java backend technologies. Experience with Solaris x86 and/or Red Hat Enterprise Linux (RHEL). Experience working in virtual machine environments. Experience supporting applications for DoD operations. Knowledge of Agile development methodologies and Scrum practices. Experience using Jira and Confluence. Experience with Jira test management plugins such as Xray or Zephyr. 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: February 18, 2026 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: Pay Range $73,450.00 - $132,775.00 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. Leidos Leidos is a Fortune 500® innovation company rapidly addressing the world's most vexing challenges in national security and health. The company's global workforce of 47,000 collaborates to create smarter technology solutions for customers in heavily regulated industries. Headquartered in Reston, Virginia, Leidos reported annual revenue of approximately $15.4 billion for the fiscal year ended December 29, 2023. For more information visit . Pay and Benefits Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here. Securing Your Data Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to . Commitment and Diversity 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 for employment qualified applicants with criminal histories consistent with relevant laws.