System Engineer with DNS knowledge (IoT) (m/f/d) at T-Systems International – Madrid | Jobyssey

At the Telco Hub in Madrid, we are pioneers in merging IT and Telco, building and scaling Telco as a Platform (TaaP) on our proprietary layered cloud. Our teams operate in cross-country and cross-functional squads, delivering cutting-edge services to Europe's most valued Operator.
Our mission is to create the best customer experience based on three core principles:
✅ Cloud-based – Harnessing the latest technologies for scalability and performance.
✅ Automated – Driving efficiency through AI, automation, and DevOps.
✅ Sustainable – Building a future-ready, environmentally conscious infrastructure.
We are looking for top engineering talent eager to grow technically and professionally in an innovative, dynamic, and collaborative environment. If you are passionate about shaping the future of telecommunications, this is your place!

The DNS Squad (consisting of 12 team members) holds the end-to-end responsibility for the resolving and authoritative DNS systems for Deutsche Telekom AG. These platforms are part of the critical infrastructure and are central core components of our german network.We are looking for a System Engineer to join our team for the resolving DNS platforms. These plattforms are resolving DNS Requests for mobile & fixed networks but also for IoT.The Team is responsible for the entire lifecycle and further development.You will be working closely with our supplier and devops engineers to design, integrate, deploy, monitor and troubleshoot our resolving DNS plattforms.

Activity Description

Implementation and operation of physical, virtualized and containerized system environments- focus on integrating a new IoT resolving Plattform in Kubernetes
Analysis, troubleshooting and documentation of system malfunctions- Regular checks and refinement of automated processes and strategies such as failover, deployment and desaster recovery to ensure a highly available and resilient system with minimum recovery time
Identification, documentation and structuring of new test use cases- Development and optimization of scripts (Ansible, Bash, Perl, Python)
Implementing changes in test, reference and productive systems to enhance system stability and/or provide new features
Development of new methods and tools for data analysis and monitoring- Cooperate with cross-functional teams to ensure end-to-end system functionality
Collaborate closely with the german operations team to streamline processes, enhance software, tools and system performance and apply innovative technologies and concepts

Must-have requirements

Fundamental knowledge of DNS (PowerDNS, DoH/DoT/DoQ) --> preferably you have worked in a TelCo company
Extensive know-how in working with Kubernetes to orchestrate CNFs
Proficiency in using as well as adapting configurations for K8s is a must
Experience with IP networks, router and LAN/WAN technologies as well as troubleshooting them with tracing tools (e.g. wireshark)
Hands-on experience of monitoring systems and data analytics (Prometheus, Medusa, …)

Nice-to-have requirements

Very good analytical skills combined with strong quality awareness
Experience in classic and agile forms of cooperation

Considerations

Being oncall for round about 8 Weeks per year and rarely perform tasks outside of regular working hours

What do we offer you?

Work environment & flexibility

International, dynamic and collaborative environment
T-Social: social initiatives (sports, community, health, ...)
Hybrid work model (remote/on-site)
Flexible working hours

Growth & development

Customized training: access to Coursera to learn whatever you want, whenever you want
Weekly language classes (English, Spanish & German)
International Mentoring Sessions & Experience Days

Compensation & benefits

Flexible compensation plan (health insurance, meal vouchers, childcare, transport)
Telemedicine
Life and accident insurance
Social fund

Wellbeing & time off

26+ working days of vacation per year
Free access to specialist services (medical, legal, wellness)
100% salary coverage during medical leave

And many more advantages of being part of T-Systems!

If you are looking for a new challenge, do not hesitate to send us your CV! Please send CV in English. Join our team!

T-Systems Iberia will only process the CVs of candidates who meet the requirements specified for each offer.

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