Database Senior ICT Engineer – MS SQL Server

Our brand Deutsche Telekom IT Solutions Slovakia entered the life of Košice region in 2006 under the name of T-Systems Slovakia and ever since has been inextricably linked with the region when became one of the founding members of Košice IT Valley. We have managed to grow from scratch to the second largest employer in the eastern part of the country with more than 3900 employees. Our goal is to proactively find new ways to improve and continuously transform into the type of company providing innovative information and communication technology services.

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. 

Purpose

We are looking for a Senior Database Engineer who will serve as a technical expert for building, monitoring, optimizing, and maintaining MS SQL Server database environments. 

The role also includes analyzing datasets, identifying opportunities for optimization, improving performance, and validating technical approaches using data-driven methods. 

   

WHAT WILL YOU DO?

• Administration, operation, and maintenance of Microsoft SQL Server environments 

• Design, implementation, and optimization of database architectures and data pipelines 

• Planning and executing installations, upgrades, migrations, and patching of SQL Server 

• Monitoring performance and tuning SQL Server databases, indexes, and queries 

• Implementing backup & recovery strategies (Full, Differential, Transactional Log backups) 

• Troubleshooting database issues, identifying root causes, and implementing corrective actions 

• Ensuring availability, reliability, and high performance of SQL database systems 

• Supporting high availability and disaster recovery (HA/DR) configurations 

• Creating and maintaining system and process documentation 

• Collaboration with development, infrastructure, and operations teams 

• Ensuring adherence to security policies, compliance requirements, and audit standards 

• Contributing to automation initiatives and continuous service improvement 

YOU WILL SUCCEED IF YOU:

• Have a minimum 3 years of hands-on experience with MS SQL Server administration 

• Understand SQL Server architecture, components, and internal processes 

• Have practical experience with: 

          - Installation, configuration, maintenance 

          - Performance tuning (indexes, execution plans, statistics) 

          - Backup & recovery (native tools, PITR) 

          - Monitoring and troubleshooting 

• Solid knowledge of T-SQL and ability to analyze and optimize complex queries 

• Experience with Windows Server environment (administration basics required) 

• Analytical, systematic, and structured working style 

• Strong teamwork, communication skills, and customer-oriented approach 

• Ability and willingness to perform on-call duties 

 

Nice-to-Have Technical Knowledge 

• Oracle 

• PostgreSQL 

• MariaDB 

• High Availability solutions (AlwaysOn, Failover Clustering, Log Shipping, Mirroring) 

• Command-line / shell scripting 

• Experience with support tools (e.g., PuTTY, monitoring dashboards, automation tools) 

• Experience with cloud-based SQL solutions (Azure SQL, SQL Managed Instance – advantage) 

 

Certifications (Preferred) 

• Microsoft SQL Server Administrator certification (e.g., MCSA, MCSE or current equivalent) 

 

Language Requirements 

• English: Upper Intermediate (B2) 

• German: Nice to Have 

 

WHY SHOULD YOU CHOOSE US?

We believe in balance between work and personal life. An attractive and extensive work-life balance portfolio guarantees lasting motivation for employees and thus a better quality of life, promotes physical and mental well-being and contributes to a positive work environment. All this with the aim of providing more freedom in reconciling work, career growth, private life and individual lifestyle. Therefore we offer to our employees over 25 different benefits to improve their personal and professional life in these areas:

• Financial benefits
• Benefits with focus on learning and development
• Benefits with focus on health and sport
• Benefits with focus on family and work – life balance
• Other benefits

For more information about our benefits click to Benefits

Salary

Final salary is negotiable.

We are offering base salary depending on seniority level and previous experience of candidate. In addition to base salary we provide variable part and other financial benefits. Base salary will not be lower than 1850€ /brutto.

Additional information

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