Staff Software Engineer (f/m/d) Managed Kubernetes

1&1 IONOS SE; Berlin; Hybrid; EUR 70,000 - 110,000; Full time

Benefits offered by this job

Hybrid working model

Flexible working hours

Canteen subsidy

Good transport connections

Employee discounts

Employee events

Training and development

Health offers

Job summary

1&1 IONOS SE is seeking an experienced Specialist Software Developer to join the Managed Kubernetes team in Berlin. You will develop and maintain our Kubernetes-based product for internal and external customers, focusing on Kubernetes architecture and operational excellence in line with CKA principles.

Responsibilities include designing cloud-native Go services, building features for our managed offering, and developing the DevOps toolchain.

Qualifications

• 3+ years of hands-on Kubernetes in production.
• Proficient Golang development with production-grade code.
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Responsibilities

• Design, develop, and maintain cloud-native apps in Golang for Kubernetes Operators and REST APIs.
• Develop features to advance the Managed Kubernetes offering.
• Contribute to service architecture and IaC processes.
• Build and maintain the DevOps toolchain (Helm, GitHub Actions, GitOps).
• Create and maintain Kubernetes operators, controllers, and CRDs.
• Implement monitoring, alerting, and observation for workloads; improve platform reliability.

Skills

Kubernetes

Golang

Kubernetes architecture

CI/CD pipelines

GitOps

Observability

Linux administration

Security vetting

Tools

Helm

GitHub Actions

Kubernetes Operators

Kubernetes CRDs

Job description

Tasks

We are seeking an experienced Specialist Software Developer to join our Managed Kubernetes team. You'll play a crucial role in developing and maintaining our Managed Kubernetes Product that serves both internal IONOS teams and external customers. This position requires experience with Kubernetes architecture and a strong focus on operational aspects aligned with the principles of CKA (Certified Kubernetes Administrator).

Tasks

• Design, development, and maintenance of cloud-native applications in Golang (Kubernetes Operators, REST APIs, libraries).
• Designing and implementing new features to improve our Managed Kubernetes offering.
• Contribute to the further development of our service architecture and infrastructure-as-code processes.
• Development and maintenance of the complete DevOps toolchain (Helm Charts, GitHub Actions, GitOps workflows).
• Creation and maintenance of Kubernetes operators, controllers and custom resource definitions (CRDs).
• Implement monitoring, alerting, and observation solutions for Kubernetes workloads; collaborate with cross-functional teams to improve platform reliability and performance.

Qualifications

• 3+ years of hands-on experience working with Kubernetes in production environments
• Proficiency in Golang development with a track record of delivering production-grade code
• Understanding of Kubernetes architecture, API resources, and extension patterns
• Knowledge of container orchestration, networking, and security principles
• Knowledge of CI/CD pipelines and GitOps workflows
• Experience with observability stacks (Prometheus, Grafana, Loki, etc.) for monitoring and troubleshooting
• Linux system administration skills
• Willingness to undergo extended security vetting (SÜ2)

Benefits

• Hybrid working model.
• Flexible working hours through trust-based working hours.
• At some locations a subsidized canteen and various free drinks.
• Modern office space with very good transport connections.
• Various employee discounts for activities and products.
• Employee events such as summer and winter parties, as well as workshops.
• Numerous training and development opportunities.
• Various health offers, such as sports and health courses.