Koutroumpis Ioannis

Β· Athens, Greece Β· gianniskt@gmail.com

Senior Cloud Platform Engineer with 11 years of IT experience, including over 7 years specializing in designing and implementing cloud solutions.

  |   Azure   |   Kubernetes   |   Terraform   |   GitOps   |   CI/CD   |  



Work Experience

Cloud Infrastructure Engineer

Sitecore
  • ☁️ Leading cloud infrastructure initiatives in Azure with a focus on AKS, GitOps (Flux), and CI/CD automation.
  • πŸ§‘β€πŸ’» Act as senior engineer on the team; reviewing IaC, mentoring engineers, and shaping architecture standards.
  • ⚑ Reduced AKS cluster bootstrapping time by 50% through migrating provisioning workflows from Ansible to GitHub Actions.
  • 🐳 Designed and implemented a custom Docker image to standardize development environments and CI/CD workflows via GitHub Actions.
  • 🌐 Participating in the network architecture redesign for Private AKS clusters, leveraging Private Endpoints, and cross-region connectivity.
  • πŸ“¦ Migrated all Cloud Platform repositories from Git tags to GitHub Releases, improving release traceability, documentation clarity, and artifact distribution.
May 2022 - Present

DevOps Engineer

interworks.cloud
  • πŸ™ Gained deep Kubernetes expertise by leading the gradual migration of a monolithic .NET Core application to microservices, while actively spreading Kubernetes knowledge across teams and enabling company-wide adoption.
  • πŸš€ Deployed and managed Kubernetes clusters across environments: on-prem (kubeadm on Hyper-V Ubuntu VMs for dev), AKS HCI hybrid clusters (QA/staging), and AKS in production.
  • πŸ” Designed and implemented a secure private Docker Registry, centralizing image management and enabling controlled distribution across Kubernetes clusters.
  • πŸ›‘οΈ Enforced container security best practices, including Docker image hardening (non-root users, minimal base images, reduced attack surface) and mutual TLS (mTLS) with Linkerd service mesh for secure inter-service communication.
  • βš™οΈ Developed CI/CD pipelines with Azure DevOps and automated tasks using PowerShell, Bash, and Python scripting.
  • πŸ–₯️ Managed extensive Linux system administration and configuration alongside Windows server environments (including IIS).
February 2021 - April 2022

System Administrator

Heron Thermoelectric S.A.
  • πŸ‘¨β€πŸ’Ό Lead System Administrator, gaining hands-on experience with Azure, firewalls, on-premise infrastructure, Active Directory, Linux & Windows servers, Office365, and VMware virtualization.
  • βš™οΈ Gradually incorporated DevOps principles by automating infrastructure management and implementing monitoring and logging solutions like Graylog and InfluxDB/Grafana, while expanding expertise in Azure Cloud.
August 2018 - February 2021

Information Technology Consultant

Prologic Computer Applications
  • 🌐 Managed computer networking tasks including routers, switches, and related hardware.
  • πŸ› οΈ Provided remote and on-site support for hardware, software, mail/DHCP servers, and networking issues.
November 2016 - July 2018

Junior System Administrator

Esser Travel
  • πŸ–₯️ Managed MS Windows Server 2008 and Active Directory environments.
  • πŸ”§ Provided IT support for hardware, software, network devices, and cabling.
  • πŸ’» Supported Windows OS, Office 365, and Microsoft Exchange services.
May 2014 - January 2016

Internship

Hellas Digital
  • πŸ› οΈ Provided hardware and software support, including installation and customization of network racks and satellite internet systems.
November 2011 - April 2012

Education

Technological Education Institute of Piraeus

Bachelor’s Degree
πŸ–₯️ Electronic And Computer Engineer
October 2006 - June 2013

Skills

Cloud & DevOps
  • Azure
  • Kubernetes
  • Docker
  • Terraform
  • Flux (GitOps)
  • GitHub Workflows
  • Helm
  • Bash
  • PowerShell

Software Development & Security
  • Git
  • GitHub
  • Containerization Security
  • Microservices Architecture

Networking
  • Network Engineering