C++ Windows Security Researcher

Rublon; Zielona Góra; Hybrid; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Private medical care

MultiSport card

Job summary

Rublon is seeking a C++ Windows Security Engineer to join our R&D team to advance passwordless authentication in Windows environments. You will conduct security research on authentication protocols and Windows security, and help integrate MFA with Active Directory.

You’ll work remotely or from our Krakow/Zielona Góra offices, collaborating with a team of cybersecurity enthusiasts on a greenfield project. Strong knowledge of Kerberos, NTLM, LDAP and Windows APIs is essential.

Qualifications

• Strong knowledge of Windows security and authentication protocols.
• Experience with Windows Server, Active Directory and GPO concepts.
• Familiarity with Kerberos, NTLM, LDAP and SMB authentication.
• Proven ability to perform security research and threat analysis.

Responsibilities

• 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

C++ development

Windows security

Active Directory

Kerberos/NTLM

Reverse engineering

PowerShell scripting

Communication

Polish/English language

Education

Advanced degree in Information Security / Cybersecurity / CS or related

Tools

IDA Pro/Free

Ghidra

Windows API

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