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Principal Software Engineer C# - Security Enterprise Solutions

Leidos

$126,100 - $227,950
Sep 27, 2025
Oceanside, CA, USA
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Leidos is seeking to update existing design and introduce new products to its line of security detection products, making travel and trade safer, healthier, and more efficient on a global level.

Requirements

  • Strong programming background with production product development experience in C required.
  • Mastery of object-oriented design (OOD) principles and practices.
  • Proven experience in software architecture and leadership roles.
  • Expertise in Agile methodologies, including TDD and Continuous Integration.
  • Ability to create design documentation, requirements specifications, and other technical documentation.
  • Strong troubleshooting and bug-fixing skills.
  • Proficiency with AI-based software development tools.

Responsibilities

  • Contribute to the design, development, testing, and maintenance of services, simulators, and diagnostics (WPF and Blazor) using C.
  • Provide technical leadership by guiding architectural decisions, fostering team collaboration, and ensuring alignment with best practices.
  • Lead the adoption of tools, including AI-based software development tools, to enhance productivity and innovation.
  • Develop software that adheres to industry security standards and enhances the security compliance of the codebase and coding practices.
  • Utilize object-oriented design principles, practices, and patterns to ensure the codebase is reusable and maintainable.
  • Apply Test-Driven Development (TDD) and Continuous Integration to ensure high-quality, continuously tested code.
  • Collaborate with Electrical Engineering, Mechanical Engineering, and Scientists to meet customer requirements.

Other

  • BS Degree and 12+ years of experience or Masters Degree with 10+ years of experience. May consider additional years of experience in lieu of a degree.
  • Must have the ability to obtain a Public Trust clearance.
  • Effective communication and collaboration skills in cross-functional team environments.
  • Ability to explain technical tradeoffs and solutions to non-technical stakeholders.
  • Must be willing to travel abroad. If travel is necessary, typically it will be < 10%.