RedHat Openshift Application Administrator (M/F)

Lokalizacja WARSZAWA,Polska,mazowieckie,- Języki angielski About the employer our client is a leading company operating in the energy sector, responsible for managing and developing critical infrastructure that supports the reliable transmission of electricity across large regions. Responsibilities • configuration, deployment, and maintenance of containerized applications on OpenShift, using manifests, Helm charts, templates, and operators, • managing application namespaces and projects, including RBAC configuration, quotas, limit ranges, and resource management, • configuration of application exposure and routing, including routes, services, TLS, external access, and load balancing, • implementation and maintenance of application security, including SCC, PodSecurity, network policies, and secrets rotation, • application scaling and optimization, including resource tuning, performance troubleshooting, and capacity improvements, • support for development teams, including pod troubleshooting, log and event analysis, restarts, and rollbacks, • collaboration on requests for new application functionalities and resource provisioning, • monitoring application health and performance, including alerts, dashboards, and capacity planning, • preparation and maintenance of technical documentation, including SOPs, application runbooks, and operational guides. Requirements • required certificates, at least 1 certification among Red Hat Certified OpenShift Administrator or an equivalent certification, or at least 3 years of additional experience in OpenShift Administration beyond the required minimum experience, with all equivalent certifications being internationally recognized and subject to acceptance by the Contracting Authority, • experience in deploying, configuring, and maintaining containerized applications on Red Hat OpenShift, • expertise in working with YAML, Helm Charts, and OpenShift Templates for application deployment, • knowledge of the OpenShift application model including Projects and Namespaces, Service Accounts, Secrets, ConfigMaps, and related components, • knowledge of application security configurations including Pod Security Admission and Standards, Security Context Constraints, Network Policies per application, and image signing or scanning, • experience in application scaling and optimization including Horizontal Pod Autoscaler, Vertical Pod Autoscaler, resource requests and limits, and probes, • knowledge of application exposure mechanisms including Routes, Services, Ingress, ExternalName, TLS termination, and API Gateway patterns, • experience in CI/CD for OpenShift applications including Pipelines, Jenkins, Argo CD, and GitOps approaches, • minimum 3 years of hands-on experience with OpenShift applications including deployment, troubleshooting, scaling, and configuration, • experience in managing application projects and namespaces including creation, quotas, limit ranges, and RBAC configuration, • practical knowledge of configuring and troubleshooting Routes, Services, and Ingress including TLS and path-based routing, • experience in implementing Network Policies and Security Constraints at application and namespace level, • experience in application monitoring and logging using OpenShift native tools as well as Prometheus, Grafana, and application-specific metrics, • expertise in GitOps and Argo CD including deployment of changes from Git into specific namespaces and applications using Helm Charts, • strong scripting and automation skills including Ansible, Python, and Helm-based automation.