RedHat Openshift Application Administrator

At Quento, the ICT arm of the Qualco Group, we deliver comprehensive and innovative solutions across AI, Digital Engineering, Cloud, and Cybersecurity, helping businesses accelerate digital transformation. With a presence in Greece, Luxembourg, and Belgium, and backed by the expertise of the Qualco Group, we combine deep technical knowledge with strategic partnerships to support business growth.

• Bachelor's degree
• Minimum 7 years of IT professional experience
• Minimum 3 years of experience in similar position
• Minimum 3 years of daily hands-on working with OpenShift applications (deployment, troubleshooting, scaling, application configuration)
• Experience in managing projects/namespaces for applications (creation, quotas, limit ranges, RBAC)
• Practical knowledge in configuring and troubleshooting Routes / Services / Ingress for applications (TLS, path-based routing etc.)
• Experience in implementing Network Policies and Security Constraints on application / namespace level
• Experience in application monitoring and logging (built-in OpenShift tools + Prometheus, Grafana, app-specific metrics)
• Expertise in GitOps / ArgoCD, Helm charts - application of changes from Git to specific namespaces / apps
• Strong scripting and automation skills with proficiency in Ansible, Python, Helm charts
• Experience in deploying, configuring, and maintaining containerized applications in RedHat OpenShift
• Expertise in working with YAML / Helm charts, OpenShift templates for application deployment
• Knowledge of OpenShift application model: Projects / Namespaces, Service Accounts, Secrets, ConfigMaps
• Knowledge of application security settings (Pod Security Admission / Standards, Security Context Constraints, Network Policies per app, image signing / scanning)
• Experience in scaling and optimisation of applications (Horizontal Pod Autoscaler, Vertical Pod Autoscaler, resource requests/limits, probes)
• Knowledge of application exposure (Routes, Services, Ingress, ExternalName, TLS termination, API Gateway patterns)
• Experience in CI/CD for OpenShift applications (pipelines, Jenkins, ArgoCD / GitOps)
• At least 1 certification among: RedHat Certified OpenShift Administrator or an equivalent internationally recognized certification
• Very good knowledge of the English language (B2)

• Configuration, Deployment and Maintenance of containerized applications on OpenShift (manifests, Helm, Templates, Operators)
• Managing namespaces / projects for applications (RBAC, quotas, limit ranges, resource management etc.)
• Configuration of application exposure and routing (Routes, Services, TLS, external access, load balancing)
• Implementation and maintenance of application security (SCC, PodSecurity, Network Policies, secrets' rotation)
• Application scaling and optimisation (resource tuning, performance troubleshooting)
• Support for development teams (pod troubleshooting, logs, events, restarts, rollbacks)
• Collaboration on requests for new functionalities / resources for applications
• Monitoring application health and performance (alerts, dashboards, capacity planning)
• Preparing and updating documentation for applications, SOPs, application runbooks
• Ensuring compliance with regulatory requirements and supporting the Group Anti-Bribery and Corruption Policy

• This role is an on-site opportunity in Poland
• CV must be submitted in English
• Quento collects and processes personal data in accordance with the EU General Data Protection Regulation (GDPR) for recruitment purposes only