Senior Software Developer

Description Leidos' High Fidelity Simulation Business Area designs and delivers cutting-edge system-of-systems solutions that power world-class simulation, training, and analysis products for the U.S. Navy . Our work spans advancements in software standards and technologies for data processing, storage, simulation and generation, and visualization , as well as the development of new software capabilities for Navy systems operating afloat and ashore . In this role, based at a U.S. Government facility in Bethesda, MD , you will apply state-of-the-art technologies to develop advanced sonar tactical decision aids (TDAs) and related software capabilities that directly support the Fleet. You will be part of a high-performing team tackling complex technical challenges across data, simulation, visualization, and tactical decision support-helping shape the Navy's tactical edge and making a tangible impact on national security . At Leidos, we empower our engineers to do meaningful work while continually building new skills , expanding their technical capabilities, and growing the career they want to achieve. Primary Responsibilities. Mentor a de-centralized team of 5+ developers, applying agile methodologies within a larger 50+ member program. Collaborate in an agile environment to design, develop, and deliver complex mission system software . Own and deliver solutions built with Java, Scala, React, and other modern technologies. Explore and apply new frameworks and languages such as Angular, Rust, or Scala to meet evolving mission needs. Troubleshoot and resolve complex technical challenges with creativity and efficiency. Make informed decisions even with limited information in dynamic, fast-paced environments. Recognize when to adapt or pivot during implementation to ensure the best technical and mission outcomes. Drive process improvements and introduce innovative workflows that enhance team performance. Influence positive change through collaboration, initiative, and technical leadership. Balance multiple priorities and adapt quickly to urgent or shifting requirements. Communicate clearly across teams, stakeholders, and leadership. Apply agile best practices to deliver high-quality, iterative results that make an impact. Travel occasionally to Manassas, VA for integration efforts and direct team collaboration. Basic Qualifications. Master's degree in Engineering, Computer Engineering, Computer Science, Information Technology, or Information Systems Ten (10) years of professional experience with software engineering. Strong software development experience with Java and/or similar object-oriented programming languages, including designing, developing, integrating, and troubleshooting complex software applications. Experience leading or providing technical direction to software developers, including mentoring team members, reviewing technical approaches, and helping drive software solutions from design through delivery. Experience with NoSQL/NewSQL data stores, the Scala, Rust, TypeScript programming languages. Experience with visualization technologies and user-interface development, including HTML5/Javascript/CSS, CesiumJS, and associated toolsets such as Angular and React. Experience with applying programming concepts in a professional or academic setting. Security+ Certification Clearance: Must be a US Citizen able to obtain a U.S. security clearance . Desired Qualifications. Experience building and supporting continuous integration pipelines (e.g. DEVOPS/DEVSECOPS) in a professional or academic setting. Agile Developer certification or Certified Scrum Developer certification with experience participating in and helping to lead day-to-day activities of a scrum team or other Agile software development team. Experience with Big Data processing technologies such as Cassandra, Kafka, Spark, etc. Experience with Kubernetes, REST, Docker and containerized microservices. Experience in development and integration of software in an environment including multiple security domains and system-of-systems. Experience with commercially available cloud computing service solutions such as Amazon Web Services (AWS). Experience in development and sustainment of Linux based software development. Demonstrated open-source contributor. 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: August 24, 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 $107,900.00 - $195,050.00 The Leidos pay range for this job level is a general guideline onlyand 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. About Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. 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 at Securing Your Data Beware of fake employment opportunities using Leidos' name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at . If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission. 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 for employment qualified applicants with criminal histories consistent with relevant laws.