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Urgent! C++ Windows Security Researcher Position in Kraków - Astec Rublon

C++ Windows Security Researcher



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:


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



  1. You’ll be invited to an online meeting with our recruiter

  2. Afterwards, we’ll ask you to do a small assignment, which will then be discussed with one of our technical leads

  3. If everything goes well, we will make you an offer and invite you to a final interview


Required Skill Profession

Computer Occupations



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