System Administrator

Billennium is a global technology company with over 20 years of experience, committed to innovation and empowering businesses. As an employer, we offer a supportive, growth-focused environment where collaboration and creativity thrive. Join us to shape the future of technology together!We are looking for an experienced OpenShift / Kubernetes Administrator who will join a long-term project focused on building and maintaining modern cloud-native platforms and database solutions. Hybrid work based in Warsaw is preferred.Scope of responsibilities:Administration and maintenance of OpenShift and Kubernetes environments.Installation, configuration, and lifecycle management of OpenShift clusters.Management of PostgreSQL databases running on Kubernetes (CNPG / EDB Postgres).Configuration and maintenance of high-availability solutions, including failover, switchover, and replication.Backup and recovery management using Barman, S3, and WAL archiving.Implementation and maintenance of GitOps practices with Argo CD.Creation and support of CI/CD pipelines within GitLab and OpenShift.Monitoring, logging, troubleshooting, and performance optimization of platform services.Implementation of security best practices across containerized environments.Required skills and qualifications:Hands-on experience administering OpenShift or Kubernetes platforms.Strong understanding of containerized environments, networking, storage, and RBAC.Experience with CI/CD and GitOps practices.Experience managing PostgreSQL databases in Kubernetes environments.Knowledge of Git, GitLab, and infrastructure automation.Experience with monitoring and logging solutions (Prometheus, Grafana, Loki, or similar).Understanding of security best practices in Kubernetes/OpenShift environments.Good communication skills and ability to work effectively in a collaborative team environment.What we offer:Non-salary benefits package — Udemy for Business, private medical care, Multisport card, veterinary care package, language lessons, shopping vouchers.Flexibility — flexible working hours and remote/hybrid work options tailored to your lifestyle and location.Career development — access to training and certifications, collaboration with global technology partners and participation in challenging infrastructure projects.Engaging community — participation in team-building events, hackathons, knowledge-sharing initiatives, and CSR activities.Company traditions — annual team-building event in the Masuria region.