Principle Software Engineer C#

Overview

Leidos is seeking a Principal Software Engineer (C#) to work for the Security Enterprise Solutions (SES) business unit in Vista, CA. The SES unit designs and manufactures security equipment for border crossings, airports, seaports, and other transportation systems, including radiation detectors, spectrometers, X-ray and gamma ray scanners, and CT explosives detection equipment for airline passenger baggage. The goal is to update existing designs and introduce new products to the security detection product line, enabling safer, healthier, and more efficient travel and trade globally.

We are seeking candidates local to Vista, CA that have the ability to work a hybrid schedule (3 days remote, 2 days onsite).

• Technical Contribution and
  
  Collaboration:
  
  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 and ensuring alignment with best practices; lead the adoption of tools, including AI-based software development tools, to enhance productivity and innovation; promote team buy-in and shared ownership of technical solutions and processes.
• Software Development and Security Compliance: Develop software that adheres to industry security standards and enhances the security compliance of the codebase and coding practices; utilize object-oriented design principles to ensure reusable and maintainable code; apply Test-Driven Development (TDD) and Continuous Integration; collaborate with Electrical Engineering, Mechanical Engineering, and Scientists to meet customer requirements.
• Problem Solving and Innovation: Evaluate customer problems, troubleshoot issues, and assist Field Service Engineers with problem resolution; drive innovation by researching and integrating best practices to develop cutting-edge solutions.
• Business Development Support: Assist with business development efforts, including concept solutioning/architecting, CONOPS, estimating, and technical bid and proposal work; evaluate and explain tradeoffs between cost, quality, and speed of delivery to less technical members of the business development team.
• Customer Interaction: Interact with customers of varying technical levels to explain and defend approaches, limitations, and solutions; answer technical questions and collaborate with customers to develop solutions that meet their needs.
• Project Estimation and Sustainability: Develop project estimates for budgeting and scheduling, including allocations for sustaining engineering, obsolescence management, and technical debt remediation; evaluate and recommend technical directions for sustaining and obsolescence activities to ensure long-term product viability; incorporate forward-thinking strategies to support sustainable product lines and reduce long-term risks.
• Communication and Reporting: Communicate proactively within a small cross-functional development team and report project status and issues to management as required.

• BS Degree and 12+ years of experience or Masters Degree with 10+ years of experience; additional years of experience may be considered in lieu of a degree.
• Must have the ability to obtain a Public Trust clearance.
• 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.
• Effective communication and collaboration skills in cross-functional team environments.
• Ability to explain technical tradeoffs and solutions to non-technical stakeholders.
• Experience developing project estimates for budgeting and scheduling, including allocations for sustaining engineering and technical debt remediation.
• Must be willing to travel abroad; if travel is necessary, typically it will be < 10%.

• Proficiency with AI-based software…