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
🚀 Ready to take the next step in your Cyber Security career?
📩 For more information, contact us at 4u@actionline.gr or 📞 210 3637822
Benefits