DevOps Engineer

About the Company:

peoplefone has been developing IP telephony platforms that connect companies in Switzerland, Germany, Austria, France, Poland, Slovakia and Lithuania since 2005. Our competitive advantage is the development of innovative products combined with our strong entrepreneur and family-oriented spirit.

About the Role

Key Responsibilities :

• Manage, maintain, and optimize self-hosted Kubernetes clusters managed through Rancher.
• Create, maintain, and improve Helm charts, Kubernetes manifests, and GitLab CI/CD pipelines.
• Deploy, upgrade, roll back, and troubleshoot applications running on Kubernetes.
• Diagnose and resolve production issues including failed deployments, CrashLoopBackOff, ImagePullBackOff, networking issues, DNS resolution, resource constraints, persistent storage failures, and TLS/certificate problems.
• Manage Kubernetes namespaces, RBAC, service accounts, secrets, ConfigMaps, certificates, and access policies.
• Implement and maintain Kubernetes networking, ingress/egress controllers, load balancing, and service discovery.
• Configure monitoring, alerting and monitor platform health, availability, and performance using monitoring and logging tools.
• Configure and maintain backup and disaster recovery procedures for Kubernetes workloads.
• Collaborate with development teams to improve application deployment processes and platform reliability.
• Automate operational tasks using scripting and Infrastructure as Code where appropriate.
• Participate in incident response, root cause analysis, and continuous platform improvements.
• Document infrastructure, deployment procedures, and operational runbooks.
• Help maintain/implement other DevOps tools like Gitlab etc.

Your Profile :

• 5 to 7 years of experience as a DevOps Engineer.
• Strong hands-on experience administering production and mission critical Kubernetes clusters, preferably self-hosted and managed using Rancher.
• Proficient in Kubernetes concepts including Pods, Deployments, StatefulSets, DaemonSets, Services, Ingress/egress, Namespaces, RBAC, ConfigMaps, Secrets, Persistent Volumes, Network Policies, and Helm.
• Strong Linux administration skills with experience in scripting and automation skills, preferably in Bash, Go or Python.
• Excellent knowledge of Docker, container images, container registries, and container lifecycle management.
• Experience with Git, GitLab, and GitLab CI/CD pipelines.
• Strong troubleshooting skills for Kubernetes deployments, networking, DNS, storage, resource constraints, and TLS/certificate issues.
• Experience with monitoring, logging, and alerting tools such as Icinga, Prometheus, Grafana, Alertmanager, OpenSearch/ELK, and FluentBit/Fluentd.
• Good understanding of networking concepts including TCP/IP, DNS, HTTP/HTTPS, TLS/SSL, load balancing, ingress controllers, and service discovery.
• Knowledge of Kubernetes security best practices, including RBAC, service accounts, secrets management, image scanning, least privilege, and certificate management.
• Strong analytical, problem-solving, and documentation skills with the ability to work independently in a production environment.

What We Offer:

• A central role in shaping the digital experience of a dynamic and fast-growing telecom company.
• Daily challenges in an open, innovative environment with a team that supports and inspires each other.
• Individual development paths with access to training, peer exchange, and continuous feedback.
• Modern structures & lean processes that let you focus on what really matters.
• A strong team culture built on shared success, regular team days, and memorable company events.
• The peoplefone group is a European leader of the IP telephony for business and residential customers.