C++ Windows Security Researcher

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: R&D on Windows and Active Directory Security Rublon’s research & development activities on Windows and Active Directory security will enable us to develop new solutions for passwordless multi-factor authentication in these environments. This is a greenfield project. How You’ll Work Location: 100% remote or office in Krakow, Zielona Gora Technology Stack: C++, Windows Server, Active Directory, LDAP, Kerberos, NTLM, Entra ID, 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 Security Engineer on the Rublon team you will help develop software for modern user authentication: Perform security research on authentication protocols (LDAP, Kerberos, NTLM, SMB) Research on Windows and Windows Server security Research on MFA integration possibilities with Windows and Windows Server Research on Active Directory security Research on Kerberos and NTLM authentication protocol security Research on MFA integration possibilities with Active Directory Research on usage of Trusted Platform Module (TPM) on Windows for secure user authentication Research on usage of Bluetooth on Windows for secure user authentication Develop enterprise software solutions for Windows user authentication Development takes place locally on your company laptop as well as on external testing environments Analyze requirements, create concepts and discuss them with the project and product manager Monitor code quality and perform code reviews Design, implement and execute development and integration tests Skills You Have Experience with reverse engineering and tools like IDA Free/Pro, Ghidra Experience with Windows software development (e.g. C++) Knowledge of Windows Server, Active Directory and GPO Knowledge of Windows API Knowledge of Kerberos and NTLM authentication protocols Knowledge of Windows technical security standards and internal controls Familiarity with VBA and PowerShell scripting Ability to confidently communicate with peers Knowledge of Polish or English language Nice To Haves Experience with Rest and/or C# programming language(s) Experience with Qt development framework Formal education and advanced degree in Information Security, Cybersecurity, Computer Science or similar and/or commensurate demonstrated work experience in the same Knowledge of software application security Demonstrated success as part of a distributed team Why Apply You love collaborating with, teaching, and learning from high-performing peers on software projects You work best in teams of high-performers rallying around achieving a common goal 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