DevOps Engineer - IMS Test Automation, Kubernetes & AI Calling

About the role

T-Systems Iberia is hiring a DevOps engineer for its Telco Hub in Madrid, which builds and scales the Telco as a Platform (TaaP) on a proprietary layered cloud. The role sits in the Voice & Messaging (T-VM) organization, within the ACS squad responsible for IMS components, and focuses on IMS test automation and the upcoming AI Calling system. The team works end-to-end, from design and engineering to deployment and operation.

Key responsibilities

• Support the IMS-MRF (Media Resource Function) deployed on Kubernetes.
• Support OneiDNS, a cloud-native DNS service for IMS nodes, also on Kubernetes.
• Support VoIP support systems, a VMware-based application landscape in the IMS fixed network provisioning chain.
• Contribute to the development of a new AI Calling system on the CaaS Kubernetes platform, enabling real-time speech processing and translation within IMS call flows.
• Work as a DevOps team covering design, engineering, deployment and operation.

Required profile

• Good experience with cloud-native technologies and containerized environments.
• Hands-on experience with IMS architectures and call flows (CSCFs, AS, MRF).
• Demonstrated experience designing and maintaining CI/CD pipelines (e.g., GitLab CI).
• Structured troubleshooting methodology and root cause analysis.
• Experience with real-time systems and performance optimization in telecom environments.
• Nice to have: experience with AI/ML integration in telecom or real-time speech processing, and knowledge of the CaaS Kubernetes platform.

Required skills

• Containers and Kubernetes orchestration (kubectl, Helm)
• Python and Bash scripting
• SIP and media debugging (Wireshark, sngrep)
• CI/CD platforms (GitLab CI, Artifactory)
• Infrastructure as Code and automation (Terraform, AWX, FluxCD)
• Observability (Prometheus, Grafana, ELK Stack)
• Testing and validation frameworks for cloud-native applications

What we offer

• Hybrid work model and flexible working hours
• Customized training via Coursera and weekly language classes
• Flexible compensation plan including health insurance, meal vouchers, childcare and transport support
• 26+ working days of vacation and free specialist services