Koutroumpis Ioannis

Cloud Infrastructure Engineer

Part of the Cloud Platform Scrum Team, which owns the implementation and operation of Sitecore Cloud Infrastructure.

• Major Achievements:
1. Deployed a custom Docker Image, which is used both as a development environment and on CI/CD procedures.
2. Participating in the Network Architecture Redesign of new Private AKS Clusters, implementing complex solutions like Private Endpoint and cross-region Virtual Wan connectivities.
3. Participating in AKS Clusters Migration, including automations, provisioning the relevant components like FluxCD / Monitoring Stack, and collaborating with application teams on configuring k8s manifest files.
4. Participating in VCS Migration from Bitbucket / Bamboo to Github Enterprise.
5. Implemented an internal Hackathon Project, about creating a FinOps Bot Advisor regarding infrastructure Resources, using Azure OpenAI, and AKS Cluster metrics.

• Technology Stack:
• Azure
• Kubernetes, Docker, FluxCD, Kustomize, Helm
• TerraForm Cloud, Ansible
• Hashicord Vault, Redis, Kafka, Cloudflare
• Elastic Stack, Prometheus Stack
• Atlassian Bamboo, Jira, Confluence
• GIT, BitBucket, Github

DevOps Engineer

Participating in R&D Department about improving Software Development Processes and Operations / Data Center Teams for automating / managing Azure Cloud or Hyper-V On-Premise Infrastructure.

• Active role in code refactoring project towards development of .NET Core microservices, along with the R&D team:
1. Planned and implemented Microservices Architecture from SRE view, including infrastructure, security, monitoring and CI/CD procedures.
2. On-Premise, Hybrid, and Azure Kubernetes Clusters provisioning, management and optimization from Development to Production Environments.
3. Container Images optimization regarding security and layers.
4. Composed YAML Manifest files, including Kubernetes Resources such as Deployments, Services, Secrets and Ingress Routes.
5. Shared Containerization & Kubernetes Knowledge through KB Pages.

• Continuous Integration / Continuous Deployments / Version Control Systems:
1. Azure DevOps Administration & Troubleshooting for various Git Repositories, Projects and Pipelines.
2. Team Foundation Version Control.

• Configuration Management / Infrastructure As Code / Automations:
1. Ansible Tower with Gitlab Integration.
2. Used Terraform to update or provision various Azure Resources like AKS, ACR, VMs, Application Gateways & VNet's.
3. Azure Pipelines.
4. Scripting Languages like Powershell, BASH & Python.

• Infrastructure Monitoring:
1. Zabbix for Hardware Resources.
2. Azure Application Insights for Web Application Monitoring & Kubernetes Clusters.
3. Linkerd Service Mesh for Kubernetes Infrastructure & Microservices.

System Administrator

Lead Administrator for system level performance optimization and system monitoring.

• Implemented & used utilities like Veeam One, Lansweeper, PRTG, Graylog & Grafana for performance monitoring of IT Infrastructure.
• Administered VMware vSphere environment, including 2 cluster-based implementations, and configuring VEEAM as Enterprise Backup system.
• Worked extensively within the corporate Active Directory, Group policy & Office 365 environment, performing resource provisioning and troubleshooting.
• Deploying & Configuring Azure Resources like VM's, Gateways, VNets and User Access Control.
• Administrating & Optimizing Watchguard Firewalls to provide cost effective security, along with Darktrace AI Cyber Security.
• Support & Collaboration with vendors about applications like CRM, SAP, Cisco Call Center e.t.c

Information Technology Consultant

Computer Networking (routers, switches e.t.c) and remote or on-site support about Hardware, Software/ Servers & Networking.

Junior System Administrator

Administering networking and telephony system. Managing MS Windows Server 2008, along with Active Directory.
IT Support at Hardware, Software, Network Devices, Cabling, Windows OS, Office 365.

Technological Education Institute of Piraeus