We're looking for a Windows Desktop Developer to join a project building a cutting-edge Software Authenticator for Windows, implementing the FIDO protocol for secure identity verification. You'll help create the foundation of a solution that connects external biometric devices, interacts with system TPM, and potentially enables passwordless login into Windows.

• Build and maintain a secure, installable Windows desktop application using WinUI 3 or WPF

• Integrate with external biometric devices via USB and low-level protocols

• Implement FIDO-based features: key pair generation, signature validation, and TPM interaction

• Collaborate on extending the authenticator to support Windows login via Credential Provider

• Ensure a smooth and secure user experience through modern UI and robust background services

• Develop and maintain audit logs, access control, and detailed technical documentation

• 5+ years of experience in Windows desktop application development

• Strong knowledge of WinUI 3 and/or WPF

• Experience with MVVM, async/await, and clean architectural patterns

• Familiarity with hardware integration (USB/Bluetooth/Serial) is a strong advantage

• Understanding of security, access control, and logging mechanisms

• Solid grasp of software design principles and patterns

• Upper-Intermediate English (spoken and written)

• Challenging Project: Join a greenfield project focused on building a secure, next-generation Windows Authenticator leveraging FIDO protocols, TPM integration, and biometric device support

• Modern Tech Stack: Work with WinUI 3, MVVM, and advanced security concepts like key pair generation, signature validation, and Credential Provider extensions.

• Autonomy and Ownership: As an external contributor, you'll have the freedom to organize your workflow while taking full responsibility for core components of the solution

• Flexible Hours: Enjoy a results-oriented approach with flexible working hours that accommodate your productivity and availability

• Strong Engineering Culture: Collaborate with a skilled and experienced team that values quality code, clear communication, and technical excellence