Windows Desktop Developer (WinUI 3, WPF)

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 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) 
   

     Responsibilities: 

• 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 

     We offer: 

• Collaborative Environment: Join a team that values collaboration, creativity, and mutual respect 
• Generous Time Off: 20 paid vacation days and 15 sick leave days annually, ensuring you have the time to recharge 
• Professional Development: We support your growth by compensating for courses, certifications, and other educational opportunities 
• Career Growth: Performance reviews and constructive feedback 
• Flexible Work Options: Work remotely from the comfort of your home or join us in our modern Kyiv office 
• Inclusive Culture: Be part of a welcoming and diverse workplace where your contributions truly matter