Job ID: 744000141444542

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

Madrid

Professional

Regular

T-Systems Iberia

Your Task

We are looking for a System Engineer to join the DNS Squad at the Telco Hub in Madrid. This team of 12 members holds end-to-end responsibility for the resolving and authoritative DNS systems for Deutsche Telekom AG, which are critical infrastructure and central core components of the German network. This position focuses on the resolving DNS platforms that handle DNS requests for mobile and fixed networks, as well as IoT. This position is based in Madrid at the Telco Hub. You will work closely with suppliers and DevOps engineers to design, integrate, deploy, monitor, and troubleshoot resolving DNS platforms. The team is responsible for the entire lifecycle and further development of these systems, operating in cross-country and cross-functional squads to deliver cutting-edge services.

Responsibilities

- Implementation and operation of physical, virtualized and containerized system environments with a focus on integrating a new IoT resolving platform in Kubernetes
- Analysis, troubleshooting and documentation of system malfunctions
- Perform regular checks and refinement of automated processes and strategies such as failover, deployment and disaster 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)
- Implement 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

Your Profile

We are looking for a System Engineer to join our DNS Squad with strong expertise in DNS systems, Kubernetes orchestration, IP networking, and monitoring systems. The ideal candidate will have experience working in telecommunications environments and be comfortable with on-call responsibilities.

Must Have Skills

- Fundamental knowledge of DNS (PowerDNS, DoH/DoT/DoQ)
- Experience working in a telecommunications (TelCo) company (preferred)
- Extensive know-how in working with Kubernetes to orchestrate CNFs (Cloud Native Functions)
- Proficiency in using and adapting configurations for Kubernetes
- Experience with IP networks, router and LAN/WAN technologies
- Experience troubleshooting networks with tracing tools (e.g. Wireshark)
- Hands-on experience with monitoring systems and data analytics (Prometheus, Medusa)
- Willingness to be on-call for approximately 8 weeks per year
- Willingness to rarely perform tasks outside of regular working hours

Nice to Have Skills

- Very good analytical skills
- Strong quality awareness
- Experience in classic and agile forms of cooperation

About Us

T‑Systems is part of the Deutsche Telekom Group, with around 30,000 employees worldwide. We create technology with purpose to generate a positive impact on society. We are looking for curious talent, eager to learn, take on challenges, and contribute ideas that transform our customers' experience. We trust people: we offer autonomy, continuous support,



and a collaborative environment where you can grow without limits. We are one global team, guided by respect, integrity, and a passion for doing better every day.

Benefits

- Flexible compensation plan (health insurance, meal vouchers, childcare, transport)
- Telemedicine
- Life and accident insurance
- Social fund
- 26+ working days of vacation per year
- Free access to specialist services (medical, legal, wellness)
- 100% salary coverage during medical leave
- T-Social: social initiatives (sports, community, health)
- Hybrid work model (remote/on-site)
- Flexible working hours
- Customized training: access to Coursera to learn whatever you want, whenever you want
- Weekly language classes (English, Spanish & German)
- International Mentoring Sessions & Experience Days

Application Information

Please send CV in English. T-Systems Iberia will only process the CVs of candidates who meet the requirements specified for each offer.

Additional Details

- Being oncall for around 8 weeks per year and rarely perform tasks outside of regular working hours

Job Benefits

Lifestyle & Wellness

- T-Social: social initiatives (sports, community, health, ...)
- Free access to specialist services (medical, legal, wellness)

Work-Life Balance

- Hybrid work model (remote/on-site)
- Flexible working hours
- 26+ working days of vacation per year

Health & Insurance

- Flexible compensation plan (health insurance)
- Life and accident insurance
- Telemedicine
- 100% salary coverage during medical leave

Professional 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

Office Perks

- Versátil compensation plan (meal vouchers, childcare, transport)
- Social fund

📌 System Engineer (m/f/d) with DNS knowledge (IoT)
🏢 T-Mobile
📍 Madrid