Windows Desktop Developer (WPF, MAUI)

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. 
 

     Requirements: 

• 5+ years of experience in Windows desktop application development 
• Strong knowledge of WPF 
• Experience with MAUI and/or UWP  
• 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) 
   

     Responsibilities: 

• Build and maintain a secure, installable Windows desktop application using WPF and MAUI/UWP 
• 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 
• Prepare the solution for cross-platform migration to MacOS and Mobile (via MAUI) 
• 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 

     We offer: 

• 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 MVVM architecture and advanced security concepts such as key pair generation, signature validation, and Credential Provider extensions. The project includes a clear roadmap for cross-platform development using MAUI, with potential migration to MacOS and Mobile. 
• 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