Are you a motivated Site Reliability Engineer who wants to make an impact by building and operating reliable, scalable, and Kubernetes-native infrastructure in production?At Open-Xchange, we develop open-source communication and collaboration software used by public sector organizations, telcos, and hosting providers to keep data secure and under their control. Our products cover email, collaboration, DNS security, and related services, and are used by millions of people worldwide.We work in a non-hierarchical organization that empowers everyone to take responsibility, stay focused, and contribute directly to the company's success and customer value.Our professionals work closely with experienced colleagues, take ownership of their work, and continuously expand their skills.Different perspectives, backgrounds, and ways of thinking strengthen our collaboration and help us see the bigger picture.You'll be part of our cross-functional Dovecot Cloud team with primary focus on developing and delivering Dovecot Pro software for Cloud based deployments, with a strong SRE and Kubernetes-native approach at the core of how we operate. We are a team of 8 members whose experience includes C and Python coding, operation, product delivery and product management.Design, development, and maintenance of Dovecot infrastructure using Ansible, Terraform, and Helm, with a key contribution to the transition toward a fully Kubernetes-native infrastructure.Improvement of CI/CD pipelines and streamlining of Kubernetes-native deployments, including Helm chart development and lifecycle management.Monitoring, troubleshooting, and optimization of system performance, including regular maintenance, updates, and incident response for production environments.Close collaboration with development teams to enhance software reliability and system design, combined with continuous knowledge sharing and staying up to date with cloud-native technologies.Participation in an on-call rotation to support production systems.This is the tech stack you'll be working with:System: Linux / Docker / KubernetesDeployment: Helm / Ansible / Terraform / KubesprayCI: Strong hands‐on experience with Kubernetes including bare‐metal or self‐managed cluster operations, workload design, and Helm chart development in production environments.Comfort working with and administering Linux systems, including networking concepts such as routing, firewalling, DNS, and network performance troubleshooting.Solid experience writing Infrastructure as Code (Terraform, Ansible) and managing Kubernetes resources in a production environment.Strong verbal and written communication skills in English.Comfortable working in a remote‐first environment with multicultural teams across different time zones.This is what you get at Open-Xchange:The flexibility to work 100% remotely ensures a work environment that suits you best.Flexible working hours that allow you to successfully combine your home and family responsibilities with work.Getting together in‐person for workshops and fun team events.