Senior C++/.Net Developer (part-time)

Our product – a passwordless MFA system. It provides strong protection for all login dialogs, services, and network protocols by eliminating Windows passwords completely from the network. By using the native Windows PKI functionality, logging into Microsoft Windows-based environments is done without additional up-streaming and without Azure. All digital certificates are managed on the server and are not saved on client devices.

The Windows client and some VPN parts are written entirely in C++ and will have to stay that way (Microsoft’s requirement). The server is written in C#. Other components are written in C#, but some of them have
constraints or special requirements, i.e., COM-connectors, WinForms usage, MMC snapin-model, etc.

All components, including native ones, communicate with each other via WCF.

Our client is a software development company from Germany. Our Client’s product- is a solution for true, multi-factor authentication without passwords.

C#, MS Windows, MS Cryptography, C++

• Developing and maintaining system-level software components of the passwordless MFA system using Microsoft native stack technologies, such as Windows API, .NET Framework, C++, and related tools.
• Utilise the native Windows PKI functionality to enable seamless logging into Microsoft Windows-based environments without additional up-streaming.
• Collaborating with system architects, software engineers, and hardware engineers to understand system requirements and design efficient solutions.
• Debugging and troubleshooting complex system-level issues, identifying root causes, and implementing appropriate fixes.
  Ensuring system security and reliability by implementing robust error handling, exception handling, and fault tolerance mechanisms.
• Collaborating with team of software engineers to integrate software components into the overall system.
• Staying up-to-date with the latest Microsoft technologies and industry trends, and evaluating their potential application in system development.

For our Windows authentication platform, we need an extension to our credential provider that would be capable of direct “talking” to FIDO2 tokens via CTAP2. We’d need to perform assertions, presence detection, and also resident key enumeration and HMAC operations where available. Yubico’s library located under https://docs.yubico.com/yesdk/yubikey-api/ is to be used for the project

• 5+ years in C++, C# programming and algorithm implementation
• Strong understanding of MS Windows architecture
• Ability to operate with Windows operating system functions and APIs, especially authentication sub-system.
• Understanding of MS Cryptography,

Will be plus:

• Knowledge of Win32, COM, MMC, WC

• Flexible working hours
• Remote work/office work
• Paid vacation
• Paid sick leave
• Corporate doctor services
• Free English classes
• Life event support
• Payment for educational courses, certificates (50%)
• Different sports activities in the office (badminton, tennis, darts, gym)
• Fully equipped office with car and bicycle parking