Software 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 as of: Basic functionalities, required models, interface design, migration concept, evasion and relapse scenarios and in more detail:

• Design, implement and test Production-grade Kubernetes operators (Go, controllerruntime/Kubebuilder or Operator SDK) with tested CRDs: o CNF LCM Operator, Service LCM Operator, Infrastructure Provisioning Operator o Test-Automation-Framework handler, Helm CNF Operator/Wrapper

• Define reconciliation logic, status/events, finalizers; implement idempotent, resilient controllers for the targeted solution

• Design, implement and test Production-grade Kubernetes operators (Go, controllerruntime/Kubebuilder or Operator SDK) with tested CRDs.

• Design, implement and test Configuration-as-Data: templates, environment specific rendering, and Git-based workflows. * Design, implement and test working integrations with Kafka, Logging Operator, 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.

• Observability by design: logs, events, metrics, error handling, retry/backoff.

• Develop, Implement and test Security & compliance integration: RBAC, Vault/ESO secret handling, image/chart provenance (Artifactory), 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 (e.g. detailed concepts, APIs, runbooks, application documents, initial user manuals).

• 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, Kubernetes APIs, CRDs, reconciliation patterns, finalizers, Role-Based Access Control (RBAC)

• Solid GitOps; Helm/Kustomize; GitLab CI/CD.

• Proven expertise in software architecture

• Business-fluent English skills

• Readiness to travel: 2-3 on-site workshops in Bonn 3 days each.

• Hybrid work model (teleworking/on-site).
• Flexible schedule.
• Continuous training: Preparation for certifications, access to Coursera, weekly English and German classes...
• Flexible compensation plan: health insurance, meal vouchers, childcare, transport assistance...
• Life and accident insurance.
• More than 26 working days of vacation per year.
• Social fund.
• Free service for specialists (doctors, physiotherapists, nutritionists, psychologists, lawyers...)
• 100% of salary in case of sick leave.

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

At T-Systems, you will find groundbreaking projects that contribute to social and ecological well-being. We want to welcome new talents like you, who bring fresh ideas, different points of view, who accept challenges and continuous learning, to grow and impact society… All this, in a fun way! It doesn't matter when or where you work. It's about doing work that matters to move society forward. For this reason, we will do everything possible to ensure that you have every opportunity to develop by offering you a support network, excellent technology, a new work environment and the freedom to work independently. We support you to constantly grow both personally and professionally, so that you can leave a notable mark on society. T-Systems is a team of around 28,000 people employed around the world, making us one of the world's leading providers of integrated end-to-end solutions. We develop hybrid cloud and artificial intelligence solutions and drive the digital transformation of companies, industry, the public sector and, ultimately, society as a whole.