ICT Engineer - MariaDB Expert

Purpose

We are looking for a MariaDB Expert who will serve as a technical specialist for designing, building, monitoring, optimizing, and maintaining MariaDB database environments.
The role also includes analyzing datasets, identifying optimization opportunities, improving performance, and validating technical approaches through data-driven decision-making.

 Team description

Join the team at operational services GmbH within Deutsche Telekom IT Solutions Slovakia, offering opportunities for German- and English-speaking talents. OS is one of the leading ICT service providers in the German market, delivering modern and secure IT solutions, long-term operational support, and ensuring availability of critical business processes for medium-sized and enterprise customers.

WHAT WILL YOU DO?

• Administration, operation, and maintenance of MariaDB database environments
• Design, implementation, and optimization of MariaDB architectures, 
• Planning and executing installations, upgrades, migrations, and patching of MariaDB instances
• Monitoring database performance and tuning queries, indexes, and configurations
• Implementing and maintaining backup & recovery strategies, including PITR (Point-in-Time Recovery)
• Troubleshooting database issues, analyzing root causes, and implementing long-term fixes
• Ensuring high availability, reliability, and optimal performance of MariaDB systems
• Managing replication setups (master-slave, GTID, semi-sync, etc.)
• Supporting high availability and disaster recovery (HA/DR) environments (e.g., Galera Cluster, MaxScale)
• Creating and maintaining technical documentation, runbooks, and operational procedures
• Collaborating closely with development, infrastructure, and operations teams
• Ensuring compliance with security policies, audit standards, and general governance requirements
• Contributing to automation initiatives and continuous service improvements