➜ ~/whoami
Stelios Giannisis
Linux Systems Engineer building reproducible, automated, and monitored infrastructure — from bare metal to Kubernetes.
01
Summary
Three years operating production Linux at noris MIKE: deploying servers, running migrations on live systems, and replacing manual work with Ansible and CI/CD. Certified Kubernetes Administrator, comfortable across the stack — orchestration, high availability, observability, and the security and compliance work that keeps it all trustworthy.
02
Experience
07/2023
— present
Linux IT Systems Engineer · noris MIKE
- Deploy, configure, and maintain Linux servers across production and staging.
- Plan and execute infrastructure migrations — cutover, validation, and rollback.
- Automate provisioning and configuration with Ansible; manage deployments via GitLab CI.
- Operate containerized workloads on Docker and Kubernetes.
- Run monitoring and alerting on Prometheus, Grafana, Thanos, and Icinga2.
- Track and remediate CVEs through patching and hardening under ISO 27001.
- Participate in on-call rotation; write technical documentation and runbooks.
03
Stack
OS & Virtualization
LinuxDebian/UbuntuRHELOpenStackVMwareProxmox
Containers
KubernetesDockerCKA
Automation & CI/CD
AnsibleGitGitLab CIbash
Observability
PrometheusGrafanaThanosIcinga2
Web & Data
nginxApacheHAProxyMariaDB GaleraPostgreSQLRedis
Core Services & Security
DNSDHCPLDAPNTPTLS/SSLISO 27001S3
04
Certifications
CKA
Certified Kubernetes Administrator · The Linux Foundation
ITIL 4
Foundation · Service Management
FCE
Cambridge First Certificate · English B2