DevOps Engineer

We seek an experienced professional to design and enhance our Kubernetes-native automation OCAS (Operator-based Cloud Automation Solution) for the Telekom Cloud environment. OCAS delivers fully declarative lifecycle management (deploy, configure, update, teardown) for containerized applications/CNFs using CRDs, controllers, and GitOps with FluxCD. Integrations include Vault/ESO, Kafka, Logging Operator, Telegraf, GitLab/Artifactory.

Scope of Work

In general the scope of work is the creation of solution and functional concepts based on the proposed solutions and project orders including basic functionalities, required models, interface design, migration concept, evasion and relapse scenarios.

Responsibilities

• Design, implement and test production-grade Kubernetes operators (Go, controller-runtime/Kubebuilder or Operator SDK) with tested CRDs including CNF LCM Operator, Service LCM Operator, Infrastructure Provisioning Operator, Test-Automation-Framework handler, and Helm CNF Operator/Wrapper
• Define reconciliation logic, status/events, finalizers; implement idempotent, resilient controllers for the targeted solution
• Design, implement and test Configuration-as-Data including templates, environment specific rendering, and Git-based workflows
• Design, implement and test working integrations with Kafka, Logging Operator, and Telegraf
• Create, build and test shared parameter models (“customer profile”) and config builders for cross-operator parameter injection
• Create and optimize GitOps repositories with FluxCD (multi-env/multi-cluster) with release templates, Helm/Kustomize overlays, release definitions, and inventory CRDs
• Specify, develop and test a fully automated CNF lifecycle including in-service upgrades, dependency management (blocking/non-blocking), scaling, and clean teardown
• Implement observability by design including logs, events, metrics, error handling, retry/backoff
• Develop, implement and test Security & compliance integration including RBAC, Vault/ESO secret handling, image/chart provenance (Artifactory), and policy alignment
• Implement project specific CI/CD pipelines (GitLab) for build, test, security scanning, and release to Artifactory
• Create detailed architecture and design documentation and technical descriptions of the target solutions including detailed concepts, APIs, runbooks, application documents, and initial user manuals, * Customized training: access to Coursera to learn whatever you want, whenever you want
• Weekly language classes (English & German)
• International Mentoring Sessions & Experience Days

We are seeking an experienced professional with strong expertise in Kubernetes-native automation, operator development, and cloud infrastructure, capable of designing and implementing production-grade solutions with comprehensive knowledge of GitOps, containerization, and software architecture., * Degree in Computer Science or a comparable STEM program

• At least five years of relevant professional experience in software development
• In-depth knowledge of object-oriented programming languages (ideally Go or Python)
• Solid experience with Kubernetes
• Solid experience with Kubernetes APIs
• Solid experience with CRDs (Custom Resource Definitions)
• Solid experience with reconciliation patterns
• Solid experience with finalizers
• Solid experience with Role-Based Access Control (RBAC)
• Solid experience with GitOps
• Solid experience with Helm/Kustomize
• Solid experience with GitLab CI/CD
• Proven expertise in software architecture
• Business-fluent English skills

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

Health & Insurance

• Health insurance (flexible compensation plan)
• Telemedicine
• Life and accident insurance
• 100% salary coverage during medical leave

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.