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 deployment pipelines (GitLab CI, Jenkins, ArgoCD).
• Cloud Networking: Advanced knowledge of AWS networking components, Transit Gateways, and hybrid cloud connectivity.

Personal Skills

• Strong troubleshooting and problem-solving skills
• Self-motivation and proactive mindset
• Ability to prioritize and manage multiple tasks simultaneously
• Strong collaboration and teamwork skills
• Excellent communication abilities
• Flexibility and adaptability in a fast-paced environment
• Continuous improvement and quality-oriented mindset

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For more information, contact us at 4u@actionline.gr or 210 3637822

Benefits