devops engineer in cybersecurity cloud infrastructure

CYBER RANGES operates enterprise, multi-region, high-availability cloud infrastructure for cybersecurity lab, cyber-range, and enterprise private-cloud environments.

• Design, deploy, and operate multi-node, highly available OpenStack environments;
• Manage OpenStack control-plane and data-plane services across multiple regions;
• Plan and execute major OpenStack upgrades and migrations, including Train, Wallaby, Yoga, Zed, Caracal, or similar releases;
• Deploy and maintain OpenStack using Kolla-Ansible and Ansible;
• Operate and troubleshoot Nova, Neutron, Keystone, Glance, Cinder, Placement, Heat, Zun, and Kuryr;
• Manage HAProxy, Keepalived, RabbitMQ, MariaDB/Galera, and Memcached;
• Integrate and operate Ceph storage with OpenStack;
• Troubleshoot complex Linux, virtualization, storage, and network issues;
• Automate deployment, monitoring, backup, recovery, patching, and lifecycle-management activities;
• Work closely with infrastructure, security, application, and operations teams;
• Produce technical documentation, operational procedures, and upgrade or recovery plans.

• At least 5 years of hands-on OpenStack engineering or operations experience;
• Proven experience building and operating production OpenStack clusters;
• Experience performing OpenStack upgrades, migrations, or major version transitions;
• Strong experience with Linux, KVM, Libvirt, Ansible, and Kolla-Ansible;
• Strong understanding of OpenStack architecture, service dependencies, cells, scheduling, and placement;
• Strong Linux networking knowledge, including VLANs, network bonding, bridges, Open vSwitch, routing, NAT, MTU, overlay networking, VXLAN, Geneve, and provider networks;
• Experience troubleshooting Nova, Neutron, RabbitMQ, Galera, HAProxy, and API-related failures;
• Good understanding of high availability, capacity planning, monitoring, backup, and disaster recovery;
• Ability to diagnose issues using logs, packet captures, service states, database records, and message queues;
• OpenStack experience limited to launching virtual machines through Horizon or using OpenStack CLI commands is not suitable;
• Nice to have: Docker and containerized OpenStack operations, Kubernetes, Helm, GitLab CI/CD, Jenkins or similar automation platforms, Prometheus, Grafana, Elasticsearch/OpenSearch or centralized logging platforms, Python or Bash scripting, experience operating OpenStack in disconnected, restricted, government, defence, or security-sensitive environments, familiarity with cybersecurity lab, cyber-range, or enterprise private-cloud environments.

• Office role in Limassol, Cyprus.