Job Description
Company Description
Ranked 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 received the Best in Educational Cooperation award from HIPA in 2019 and was acknowledged as 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
Join the team at operational services GmbH within Deutsche Telekom IT Solutions, 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.
Purpose of the Role
We are looking for a Senior 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.Key Responsibilities
• 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
Qualifications
Required Skills & Experience
• Minimum 3 years of hands-on experience with MariaDB or MySQL administration
• Strong understanding of MariaDB architecture, components, and internal processes
• Practical experience with:
• Installation, configuration, maintenance
• Query tuning, execution plan analysis, indexing strategies
• Backup & recovery concepts and tools
• Monitoring and troubleshooting complex issues
• Solid knowledge of SQL and ability to optimize complex queries
• Familiarity with Linux server environments (administration fundamentals required)
• Experience with replication (ROW/STATEMENT, GTID, async, semi-sync)
• Experience with HA/cluster setups (Galera, MaxScale – advantage)
• Analytical, systematic, and structured way of working
• Strong teamwork, communication skills, and customer-oriented approach
• Ability and willingness to perform on-call duties
Nice-to-Have Technical Knowledge
• Experience with additional RDBMS platforms (Oracle, PostgreSQL, MS SQL Server)
• Understanding of cloud-based database services (Azure, AWS RDS, Google Cloud SQL)
• Knowledge of shell scripting (Bash) or automation tools
• Experience with monitoring tools and dashboards
• Familiarity with containerized database deployments (Docker, Kubernetes)
Certifications (Preferred)
• MariaDB, MySQL, or Linux administration certifications are an advantage
Education
• Bachelor’s degree in Computer Science, Information Technology, or equivalent vocational training
• Comparable experience with a strong practical background is also acceptable
Language Requirements
• English: Upper Intermediate (B2)
• German: Nice to Have
Additional Information
Please note: remote working is only possible from within Hungary due to European taxation regulations.
\* Please be informed that our remote working possibility is only available within Hungary due to European taxation regulation.
