C++ Windows Software Engineer — Secure MFA & FIDO2

Rublon Access Gateway; Kraków; On-site; PLN 180,000 - 240,000; Full time

Job description

Join Rublon to work with a team of cybersecurity enthusiasts who are building the future of enterprise user authentication. Rublon MFA is a multi-factor authentication platform used by hundreds of customers across the globe to protect employee logins to networks, servers and applications.

We are looking for a long-term employee who will support us in the following area:

Development of MFA Connector for Windows & RDP

Work on enhancing and extending the capabilities of Rublon’s MFA connector for Windows and Remote Desktop Protocol (RDP). You will play a key role in securing customer IT environments by building reliable, user-friendly, and secure multi-factor authentication solutions as part of our Windows authentication development team.

How You’ll Work

• Technology Stack: C++ 11 or higher, Qt, FIDO2
• Self development: access to online training courses, sponsored certifications
• Benefits for employees: access to private medical care and MultiSport card

What You’ll Do

As a C++ Windows Software Engineer on the Rublon team you will:

• Design and develop new features for Rublon’s MFA connector for Windows & RDP
• Enhance authentication flows to further secure enterprise IT environments
• Build desktop applications using C++ (11 or higher) and the Qt framework
• Integrate cutting-edge authentication standards such as FIDO2 and passwordless login
• Work closely with engineers, project managers, and product managers to refine requirements
• Ensure that software is efficient, maintainable, and secure
• Create and execute unit, integration, and system tests to ensure stability
• Perform code reviews and contribute to maintaining high-quality coding standards
• Improve user experience for enterprise Windows authentication scenarios

Skills You Have

• At least 3 years of commercial experience in developing C++ software
• Experience with Qt desktop software development
• Knowledge of Windows API
• Ability to come up with creative concepts using modern technologies together in unexpected ways
• Interest in information security and secure software design

Nice To Haves

• Knowledge of FIDO2 passwordless authentication
• Knowledge of software application security
• Knowledge of Windows Server and RDP configuration
• Experience with CI/CD environments
• Knowledge of Active Directory security
• Formal education and advanced degree in Information Security, Cybersecurity, Computer Science or similar and/or commensurate demonstrated work experience in the same

Why Apply

• You want to work on enterprise-grade authentication software used worldwide
• You are passionate about securing IT environments against cyber threats
• You thrive in a team that values innovation, security, and software quality
• You are looking for professional growth in cybersecurity and advanced Windows development

Steps After You Apply

• You’ll be invited to an online meeting with our recruiter
• Afterwards, we’ll ask you to do a small assignment, which will then be discussed with one of our technical leads
• If everything goes well, we will make you an offer and invite you to a final interview