System Engineer with DNS knowledge (IoT) (m/f/d)

T-Systems Iberia

4d•Hybrid

About The Position

T-Systems is seeking a System Engineer to join the DNS Squad at its Telco Hub in Madrid. The 12-member squad is responsible for the complete lifecycle and further development of Deutsche Telekom AG’s resolving and authoritative DNS systems, which are critical infrastructure components of the German network. The role focuses on the resolving DNS platforms serving mobile, fixed-network, and IoT requests, including integration of a new IoT resolving platform in Kubernetes. Working closely with suppliers, DevOps engineers, and the German operations team, the System Engineer will design, integrate, deploy, monitor, and troubleshoot platforms across physical, virtualized, and containerized environments. The role also contributes to platform resilience, automation, monitoring, testing, and continuous improvement. The position is based in a hybrid work model with flexible working hours and includes on-call duty for approximately eight weeks per year, with occasional work outside regular hours.

Requirements

Fundamental knowledge of DNS, including PowerDNS and DoH/DoT/DoQ.
Extensive know-how working with Kubernetes to orchestrate CNFs.
Experience using and adapting Kubernetes configurations.
Experience with IP networks, routers, and LAN/WAN technologies, including troubleshooting with tracing tools such as Wireshark.
Hands-on experience with monitoring systems and data analytics, such as Prometheus and Medusa.

Nice To Haves

Experience working in a telecommunications company.
Very good analytical skills and strong quality awareness.
Experience with both classic and agile forms of cooperation.

Responsibilities

Implement and operate physical, virtualized, and containerized system environments, with a focus on integrating a new IoT resolving platform in Kubernetes.
Analyze, troubleshoot, and document system malfunctions.
Regularly check and refine automated processes and strategies, including failover, deployment, and disaster recovery, to maintain high availability and resilience with minimal recovery time.
Identify, document, and structure new test use cases.
Develop and optimize scripts using Ansible, Bash, Perl, and Python.
Implement changes in test, reference, and production systems to improve stability or provide new features.
Develop methods and tools for data analysis and monitoring.
Work with cross-functional teams to ensure end-to-end system functionality.
Collaborate with the German operations team to streamline processes, improve software, tools, and system performance, and apply innovative technologies and concepts.

Benefits

Hybrid work model with remote and on-site work.
Flexible working hours.
Customized training and access to Coursera.
Weekly English, Spanish, and German language classes.
International mentoring sessions and Experience Days.
Flexible compensation plan covering options such as health insurance, meal vouchers, childcare, and transport.
Telemedicine.
Life and accident insurance.
Social fund.
Wellbeing services.
At least 26 working days of vacation per year.
Free access to specialist medical, legal, and wellness services.
100% salary coverage during medical leave.