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.

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.