Mid-Senior Systems Engineer (Linux, K8s/OpenShift & AWS)

🏢 About Actionline Actionline is a Greek company specializing in innovative Human Resources and Recruitment solutions since 2011. On behalf of our client, a leading company in the Energy sector, we are seeking an experienced Mid-Senior Systems Engineer to join a dynamic and highly skilled team. 📌 Location: Athens 🏢 Industry: Energy 💼 Employment Type: Full-time 📍 Work Model: On-site 🔹 Position Overview We are seeking a highly skilled Mid-Senior Systems Engineer with strong cloud and container expertise. In this role, you will be a key contributor to managing, automating, and scaling our enterprise Linux environments, hosted primarily on Amazon Web Services (AWS) and orchestrated via OpenShift or Kubernetes . The ideal candidate bridges the gap between modern cloud architecture and robust system administration. If you have deep Linux expertise , hands-on AWS experience , and a passion for managing containerized workloads at scale, we want you on our team. 🔎 Key Responsibilities Cloud Architecture & Support: Design, deploy, and maintain scalable, highly available infrastructure utilizing core AWS services (EC2, EKS, IAM, S3). Container Orchestration: Manage, scale, and optimize production Red Hat OpenShift or Kubernetes clusters (including AWS-managed solutions like EKS). Linux Platform Management: Administer, configure, and fine-tune enterprise Linux operating systems (RedHat/Oracle Linux, Ubuntu) for optimal cloud performance. Infrastructure as Code (IaC): Drive automation by provisioning and managing AWS resources using Terraform or Ansible. Monitoring & Cost Optimization: Implement robust cloud monitoring, logging, and alerting systems while proactively optimizing AWS resource usage and costs. Security & Compliance: Enforce cloud security best practices, handling OS hardening, AWS IAM policies, and network security groups. Cross-Functional Collaboration: Partner with Dev and DevOps teams to ensure smooth application deployment pipelines and infrastructure resilience. ✅ Qualifications & Experience Experience: 5 years of experience in Systems Engineering or Cloud Operations role. AWS Expertise: Proven track record of configuring and managing production workloads in AWS environments . Linux Proficiency: Advanced administration skills, deep understanding of networking (TCP/IP, DNS, routing), and strong scripting abilities (Bash, Python). Containerization: Hands-on experience orchestrating containers with OpenShift or Kubernetes in enterprise settings. Automation Tools: Practical experience with infrastructure automation tools, specifically Terraform and Ansible . Problem-Solving: Analytical mindset with a strong track record of troubleshooting complex cloud and container infrastructure issues. ✅ Preferred Attributes Certifications: AWS Certified SysOps Administrator / Solutions Architect, Certified Kubernetes Administrator (CKA), or Red Hat certifications (RHCE). CI/CD Tools: Familiarity with modern…