Senior Devops Engineer - CaaS

What we are looking for

• University degree in Computer Science, Telecommunication Engineering, Information Systems, or comparable qualification.
• Fluent in English, verbally and written.
• 5+ years of experience in cloud-native environments, with a proven track record in DevOps and platform engineering.
• Technical skills
• Extensive experience with Linux environments, including advanced shell/Bash scripting for complex operations and automation.
• Strong hands-on expertise in designing and optimizing CI/CD pipelines with GitOps tools (e.g., GitLab, Flux, ArgoCD) for consistent, scalable, and secure delivery.
• In-depth Kubernetes knowledge, covering advanced deployments, cluster administration, lifecycle management, and troubleshooting in large-scale production environments.
• Strong Go (Golang) programming skills, with proven backend development for distributed systems, including tools, microservices, operators/controllers, and Kubernetes-focused automation.
• Solid IT operations background, with hands-on use of observability tools (Prometheus, Grafana, ELK/EFK) for incident response, root cause analysis, and reliability engineering.
• Advanced experience with Infrastructure as Code (IaC) using Helm or Terraform for cloud-native automation.
• Strong knowledge of cloud-native security, including secure cluster setup, secrets management, RBAC, and network policies in Kubernetes.

Nice-to-Have

• Familiarity with advanced Kubernetes networking (e.g., Calico, Cilium), service meshes, and multi cluster setups.
• Experience with Cluster API for lifecycle management and integration of cloud platforms with storage and load balancing (e.g., Cinder, Octavia, AWS/GCP/Azure).
• Experience with TelCo OSS/BSS systems or large-scale enterprise/private cloud environments.
• Don't worry if you miss some of these skills – we are here to grow and develop you.

About the team

• Group Network Technology (GNT) is a key part of Deutsche Telekom, where international teams shape and deliver innovative telecommunications IT and network technology solutions across Europe - from architecture and engineering to development, testing, infrastructure, and operations.
• In Cloud, we build and operate Deutsche Telekom’s on-prem Telco Cloud across all layers - from hardware to orchestration - based on open-source technologies. This is where modern infrastructure meets real-world impact at scale.
• Our chapter-based model creates a strong home for expertise, learning, and collaboration - empowering people to grow, contribute in agile teams, and thrive in an inclusive environment while making a meaningful difference for our customers.

What you'll be doing

• Take leadership in the design, development, and continuous improvement of CaaS and PaaS platforms built on the Kubernetes ecosystem, with a strong emphasis on backend development in Golang.
• Architect and implement new platform features, ensuring scalability, reliability, and security.
• Develop and maintain advanced CI/CD pipelines (GitLab, GitOps) to automate and optimize software delivery.
• Integrate and extend monitoring, observability, and incident response solutions (Prometheus, Grafana, ELK).
• Drive the adoption of best practices in coding, testing, security, and code reviews, mentoring other engineers in software craftsmanship.
• Take ownership of complex troubleshooting, root cause analysis, and performance optimization.
• Collaborate with cross-functional teams to deliver highly available, resilient, and secure cloud-native services.
• Contribute to strategic decisions on platform architecture and deployment strategies.
• Actively participate in knowledge sharing, technical leadership, and mentoring within the team.
• Participate in on-call rotation (for stand-by operations).

What you can expect

• Our team is dedicated to supporting new team members and we're building an environment that appreciates knowledge sharing and mentorship. Our experienced team members are passionate about coaching junior and new members of the team.
• We take a long-term commitment when it comes to our employees. You will develop your career working in truly innovative projects of Deutsche Telekom Group, exploring the latest trends and technologies which enable the product development process.
• We offer an open and friendly working environment, competitive remuneration package and attractive benefit scheme.
• Enjoy the benefits of flexible hours, part-time roles, and remote work options - so you can balance your career with family life and personal priorities.

Benefits and Training opportunities

• Flexible working hours with partial home office options.
• Comprehensive benefits package (laptop, mobile phone, cafeteria, insurance).
• Employee discount rates on Telekom services.
• Modern, multinational working environment with amenities like a sky bar and rooftop gym.
• Access to our Employee Assistance Program.
• Comprehensive Healthcare Package
• You will receive a minimum of 25 days of basic vacation per year (based on age)
• We offer 15 days of additional vacation if you become a father, with 100% pay
• You'll have access to thousands of professional and skills development materials from our extensive digital training palette
• We offer regular internal training sessions and workshops
• You can learn English and German, even with a native speaker
• You’ll have access to Percipio and Coursera courses