C Software Engineer – Linux/UNIX System Interface (Cyber Security)
About Us
We are looking for a skilled Software Engineer with strong expertise in C application development and Linux/UNIX system interfaces to join our multinational team. Working in an international environment with global customers, you will contribute to critical authentication infrastructure projects, focusing on Kerberos-based systems and low-level security solutions.
Requirements
Key Responsibilities
Design, develop, and maintain C-based applications in Linux/UNIX environments
Work with system-level interfaces (POSIX APIs, processes, file systems, sockets)
Develop and enhance Kerberos authentication systems and related tooling
Maintain and improve internal implementations of open-source technologies such as OpenSSH
Monitor performance, debug, and optimize low-level system components
Build automation tools to streamline administrative and operational processes
Improve and maintain CI/CD and deployment automation pipelines
Collaborate with engineers, product owners, and stakeholders on authentication strategies
What will you need
Strong proficiency in the C programming language
Deep understanding of Linux/UNIX system programming and system interfaces
Solid experience in network programming
Good knowledge of security concepts (authentication, authorization, cryptography)
Experience working in controlled enterprise environments
Practical experience with Perl and Python
Strong attention to detail and good organizational skills
Ability to communicate complex technical topics clearly
Strong teamwork skills in a distributed environment
Nice to haves
Experience working in an Agile environment using tools such as Jira
Experience contributing to UNIX/Linux-based open-source projects
Why should you join
BlackBelt team - You can join a cool and professional team, where everyone has a BlackBelt in technology;
Development - We are supporting your growth with trainings and certifications;
Diversity - You can switch between projects and Delivery Units;
WOW - We are supporting our colleague's health and well-being with WOW (Wellbeing Office Way) program;
Support - We are a caring organisation, if you face difficulties you can always count on us.