Role Description Join the team at Operational Services GmbH, within Deutsche Telekom Systems Solutions Slovakia, providing opportunities for German-speaking talents in Slovakia. OS is one of the leading ICT service providers in the German market and is considered the backbone of digitization in medium-sized companies. - Design, develop, implement, and support ICT components, cloud solutions, and applications to deliver a high-quality product and service portfolio. - Act as a senior technical expert and lead architect, responsible for the design, implementation, and operation of Microsoft and cloud-based solutions, ensuring stability, scalability, and efficiency. - Perform, coordinate, and improve complex activities (3rd level environment) to provide IT services and supporting infrastructure, fulfilling relevant KPIs. - Build, consult, and implement cloud architectures (public, private, hybrid, multi-cloud), with strong focus on Microsoft Azure and related technologies. - Support migrations of IT infrastructures and software solutions to the Azure cloud and manage related customer projects. - Design, develop, and implement architectures of services based on platform requirements, ensuring compliance with business needs and industry standards. - Provide consulting and advisory services to customers, management, and project teams regarding IT, cloud, and DevOps architecture. - Mentor and train co-workers to share expertise, spread knowledge, and build internal competencies. - Research and adopt new technologies, processes, and methods for automation, optimization, and innovation. - Manage relationships with key vendors, particularly Microsoft, to stay up to date on innovations, licensing, and best practices. - Identify weaknesses in processes, propose improvements, and implement cost optimization and efficiency measures. - Act as the key technical lead, coordinating activities across related technologies and multiple stakeholders. Qualifications - Speak German (B2 - C1 – mandatory) and English (B2–C1 preferred). - Hold a Master’s or diploma degree in Information Technology (or equivalent knowledge and experience). - Have 5+ years of professional experience in Microsoft products and technologies (Windows Server, Hyper-V, Active Directory, Azure, Azure Stack, MS SQL Server, O365, Dynamics365). - Bring strong expertise in licensing of Microsoft products and solution design in the IT outsourcing environment. - Have solid knowledge of applications, infrastructures, architecture concepts, virtualization, networking, operating systems, and security. - Possess proven experience in cloud computing (IaaS, PaaS, SaaS) and DevOps practices. - Hold relevant technical certifications (e.g., MCSE, MCSD, or other cloud/DevOps certifications). - Are experienced in project management, quality management, and financial literacy. - Have strong leadership, presentation, and negotiation skills, as well as mentoring and training experience. - Demonstrate excellent problem-solving ability, analytical thinking, and a hands-on, team-player mentality. Benefits - 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 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 2500€ /brutto. Additional Information Please be informed that our remote working possibility is only available within Slovakia due to European taxation regulation. Location: Remote from Slovakia Company: Deutsche Telekom System Solutions Slovakia Language: German and English Job category: Technical positions

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• Operate and maintain Linux-based infrastructure (Debian/Ubuntu). • Deploy, manage, and scale Kubernetes clusters across bare-metal, virtualized, and on-prem environments. • Oversee full cluster lifecycle: upgrades, node pools, networking, storage, and security hardening. • Implement automation for provisioning and operations using Ansible, Bash/Python, and GitOps workflows. • Design and maintain networking architecture including VLANs, L2/L3 routing, VPNs, and multi-site connectivity. • Build automated deployment workflows (PXE boot, Preseed, cloud-init). • Deploy and maintain observability stacks (Prometheus/Grafana, Loki, ELK, Graylog). • Lead incident response and escalation activities across the platform. • Improve system availability and reduce latency at all levels. • Define and implement SLOs/SLIs at multiple infrastructure levels (physical network/hardware, platform virtualization, software services). • Optimize alerting and monitoring pipelines to provide actionable insights. • Establish and maintain on-call schedules to ensure coverage across timezones. • Develop Standard Operating Procedures (SOPs) for repeatable operations and maintenance tasks. • Coordinate physical maintenance for Policlouds (periodic maintenance, hardware issues, DC-Ops). • Manage virtualization and orchestration layers (OpenStack, Proxmox, VMware). • Help develop and maintain overall architecture across all products. • Plan resources for future initiatives, accounting for demand and growth projections. • Work with development teams to improve overall quality and optimize resource utilization. • Collaborate with cross-functional stakeholders (Hivenet, Policloud, Customer Success teams).

• Operate and maintain Linux-based infrastructure (Debian/Ubuntu). • Deploy, manage, and scale Kubernetes clusters across bare-metal, virtualized, and on-prem environments. • Oversee full cluster lifecycle: upgrades, node pools, networking, storage, and security hardening. • Implement automation for provisioning and operations using Ansible, Bash/Python, and GitOps workflows. • Design and maintain networking architecture including VLANs, L2/L3 routing, VPNs, and multi-site connectivity. • Build automated deployment workflows (PXE boot, Preseed, cloud-init). • Deploy and maintain observability stacks (Prometheus/Grafana, Loki, ELK, Graylog). • Lead incident response and escalation activities across the platform. • Improve system availability and reduce latency at all levels. • Define and implement SLOs/SLIs at multiple infrastructure levels (physical network/hardware, platform virtualization, software services). • Optimize alerting and monitoring pipelines to provide actionable insights. • Establish and maintain on-call schedules to ensure coverage across timezones. • Develop Standard Operating Procedures (SOPs) for repeatable operations and maintenance tasks. • Coordinate physical maintenance for Policlouds (periodic maintenance, hardware issues, DC-Ops). • Manage virtualization and orchestration layers (OpenStack, Proxmox, VMware). • Help develop and maintain overall architecture across all products. • Plan resources for future initiatives, accounting for demand and growth projections. • Work with development teams to improve overall quality and optimize resource utilization. • Collaborate with cross-functional stakeholders (Hivenet, Policloud, Customer Success teams).