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Senior Software Developer - TS/SCI Clearance Required

Leidos

$126,100 - $227,950
Sep 3, 2025
Reston, VA, US
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Leidos seeks a Software Engineer to lead the creation of new software capabilities within a matrixed research and development organization, focusing on solving difficult analytical, modeling, and engineering challenges within the government problem domain.

Requirements

  • advanced knowledge (at least 12 years) of computer science, application development, requirements collection, system design, data analysis, test, simulation, and verification of software simulation or decision systems
  • write various coding languages (for example: Java, C++, Python, R, JavaScript, HTML)
  • construct enterprise solutions using multi-level architectures, containerization, cloud services, database systems, and COTS integration (for example: JBoss, Tomcat, MySQL, PostgreSQL, MongoDB, Docker)
  • 5+ years’ Java experience, building HTML/JavaScript (eg. Angular) user interfaces, data storage back ends in json, sql, or no-sql databases
  • Experience building simulation “gameboards” and scenario-design tools
  • 3+ years’ experience with detailed Agent-Based simulations, formatting input or post-processing output
  • Capability to execute Extract-Transform-Load (ETL) scripting, build custom scripts, generate docker containers, and collect data within both a Windows and a Linux/Unix environment

Responsibilities

  • designing and developing browser-based applications
  • backend data ETL
  • 3D modeling
  • AI integration
  • construct enterprise solutions using multi-level architectures, containerization, cloud services, database systems, and COTS integration
  • mentor and lead teams of other subject matter experts, guiding and teaching junior and mid-level resources in the process of defining new systems to achieve specific research and development goals
  • conceive of, prototype, and present new analytic tools that deal with qualitative and user survey collected data as well as geospatial, numeric, and scientific data and programming

Other

  • Candidates for consideration must possess an active and in-scope Top Secret clearance with the ability and willingness to obtain SCI and Polygraph after start.
  • This position requires US citizenship.
  • 3+ years’ experience in the intelligence and/or DoD communities
  • 3+ years’ experience delivering tools or solutions to end users, guiding them through adaptation, and working through emerging requirements.
  • Ability to work closely with users to design, build, prototype, and deploy software systems within highly managed government environments