Linux System Engineer (REF4344X)

Company Description

As Hungary’s most attractive employer in 2025 (according to Randstad’s representative survey), Deutsche Telekom IT Solutions is a subsidiary of the Deutsche Telekom Group. The company provides a wide portfolio of IT and telecommunications services with more than 5300 employees. We have hundreds of large customers, corporations in Germany and in other European countries.

DT-ITS recieved the Best in Educational Cooperation award from HIPA in 2019, acknowledged as the the Most Ethical Multinational Company in 2019. The company continuously develops its four sites in Budapest, Debrecen, Pécs and Szeged and is looking for skilled IT professionals to join its team.

Job Description

We are seeking a skilled and motivated Linux Site Reliability Engineer (SRE) to join our team. The ideal candidate will have a strong background in Linux system administration, automation, and cloud infrastructure, with a passion for building reliable and scalable systems. You will collaborate with development and operations teams to ensure our services are highly available, performant, and fault-tolerant.

Job Description

• Onboarding of New Customers: Ensure smooth deployment and operational readiness, document processes and provide initial support during the transition.
• System Administration: Manage, monitor, and optimize Linux servers in production and development environments. Identify and resolve bottlenecks in application and system performance.
• Automation: Develop and maintain infrastructure automation using tools like Ansible, Terraform, or similar. Creation and Maintenance of Hardening and Washing Script (Ansible).
• Performance Optimization: Diagnose and resolve performance bottlenecks at the OS, application, and network levels. Analyze system demands and plan for scaling.
• Incident Management: Lead efforts to quickly resolve production incidents, conduct post-mortems, and implement solutions to prevent future occurrences.
• Scalability: Work on infrastructure scalability and reliability for high-traffic services.
• Collaboration: Partner with development teams to create CI/CD pipelines and integrate reliability practices into the development lifecycle. Coordinate changes with Operation Teams.
• Security: Ensure system security through best practices in access control, patch management, and system hardening.

Qualifications

• Extensive experience with Linux distributions like RHEL, CentOS, or Ubuntu.
• Shell scripting (Bash, Zsh)
• System configuration and tuning
• Package management (apt, yum, rpm)
• User and group management
• File system management
• Network configuration (TCP/IP, DNS, firewall)
• Security best practices (e.g. hardening systems, user permissions)
• Programming languages (Python, Go, Ruby)
• Version control (Git)
• CI/CD pipelines (Jenkins, GitLab Ci/CD)
• Cloud platforms (AWS, GCP, Azure)
• Containerization management tools (Ansible, Puppet, Chef)
• Monitoring and alerting tools (Prometheus, Grafana, Nagios)
• Experience with automation frameworks and tools
• Knowledge in automated installation of different Linux distributions (Kickstart, Preseed, Cloud-init)
• Knowledge of DevOps principles and practices
• Ability to write scripts and tools to automate tasks

Nice to have/preferred skills and experience (not required)Exposure to high-availability architectures and disaster recovery strategies.

• Security
• Networking
• Database administration (MySQL, PostgreSQL)
• Big Data (Hadoop, Spark, Kafka)
• German language knowledge is an advantage.
• Penetration testing
• Vulnerability scanning
• Security incident response
• Load balancing
• VPNs
• Network protocols (TCP/IP, HTTP, HTTPS)

Additional Information

* Please be informed that our remote working possibility is only available within Hungary due to European taxation regulation.