Systems Modeling and Simulation Engineer - Principal/Senior Principal

Utilize full life cycle design, implementation, and unit testing of software using C# / .NET (including CLR, garbage collection, JIT compilation). Leverage core computer science fundamentals—algorithms, data structures, and complexity analysis—to solve logical and mathematical problems. Develop, profile, and tune high performance, optimized code; conduct runtime analysis and memory usage profiling. Build and maintain desktop applications with WPF and the MVVM pattern; extend MVVM concepts to modern UI frameworks such as Blazor while preserving a consistent architecture across platforms. Design and publish reusable UI component libraries that work in both WPF and Blazor environments. Implement common application patterns (CRUD, DTO design, gRPC services) to enable efficient data exchange. Create and maintain technical documentation; translate design decisions for both technical and non-technical stakeholders. Requirements Must have a Bachelor of Science degree in a STEM field and 5 years of relevant military / professional experience, OR a Master of Science degree in a STEM field 3 years of relevant military / professional experience, OR a PhD and 1 year of relevant military / professional experience Must have an active U.S. Government Secret Clearance or higher Strong grasp of agile software development methodologies Proficiency with Object Oriented languages (C#, C++, Java, etc.) and Windows based development Demonstrated expertise in the .NET runtime, CLR internals, garbage collection, and JIT compilation Proven ability to write highly optimized, performant code and conduct profiling/tuning Expert use of Visual Studio (debugging, refactoring, performance analysis) Significant experience with version control tools (Bitbucket, GitHub, GitLab, Git, TFS) and CI/CD pipelines. A good knowledge of secure coding standards and relevant defense compliance (NIST, DoD). ATS Optimization Keywords Below are skills and terms extracted directly from this job posting to improve Applicant Tracking System (ATS) visibility. This unique feature helps candidates tailor their applications more effectively — a feature exclusive to JobTailor job listings. Hard Skills C# .NET algorithms data structures complexity analysis WPF MVVM gRPC CRUD DTO design Soft Skills communication problem solving technical documentation stakeholder engagement Certifications & Qualifications Bachelor of Science Master of Science PhD U.S. Government Secret Clearance #J-18808-Ljbffr Jobtailor