Sr Desktop App Developer (.NET) (TS/SCI)

Position Overview

Our end-client is seeking a Senior Desktop Application Developer to join a high-impact team supporting mission-critical systems in a secure federal environment. This role is ideal for a seasoned developer with a strong background in Windows desktop applications and a passion for secure, high-performance software development.

Clearance Required: Active Top Secret (TS) - TS/SCI Preferred
Citizenship: U.S. Citizenship Required due to federal contract conditions.

What You'll Do

• Design, develop, and maintain secure desktop applications using modern frameworks.
• Refactor and modernize legacy systems to meet current security and performance standards.
• Collaborate with cross-functional teams including cybersecurity, DevOps, and systems engineering.
• Ensure compliance with federal security standards (e.g., STIGs, RMF).
• Participate in Agile development cycles, including sprint planning and code reviews.

Required Skills & Experience

• 8+ years of experience in desktop application development.
• Proficiency in:
  • C#, .NET Framework/.NET Core, WPF, WinForms
  • C++ (including MFC), PowerShell, Python
  • Windows API, COM/DCOM
• Experience with:
  • Visual Studio, Git, Azure DevOps
  • Secure coding practices (OWASP, NIST 800-53)
  • DISA STIGs, RMF, and vulnerability remediation
  • Windows Services, IPC, Active Directory, PKI
  • Unit testing frameworks (MSTest, NUnit, xUnit)
  • UI automation tools (e.g., WinAppDriver, TestComplete)

Preferred Qualifications

• TS/SCI with CI Polygraph
• Bachelor's or Master's in Computer Science, Engineering, or related field
• Experience in DoD, IC, or other federal environments
• Familiarity with:
  • Cross-platform development ( Qt, Electron)
  • Virtualization ( VMware, Hyper- V) and containerization ( Docker)
  • Windows internals and debugging tools (e.g., WinDbg)