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Oleh Hordiienko
Senior DevOps Engineer | Kubernetes & Infrastructure
Kharkiv, Ukraine (Remote only)
Email: [открыть контакты](см. выше в блоке «контактная информация») | Phone: [открыть контакты](см. выше в блоке «контактная информация»)
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Professional Summary
Seasoned Senior DevOps Engineer with over a decade of hands-on experience in infrastructure
automation, Kubernetes operations, CI/CD design, and hybrid/cloud-native architectures.
Specialized in building production-ready K8s clusters with Rancher, Kubespray, and Tanzu,
managing GitOps workflows with ArgoCD and GitLab CI, and delivering resilient, scalable
infrastructure as code with Terraform and Ansible. Proven expertise in observability stacks, secure
delivery pipelines, and infrastructure troubleshooting in both high-scale enterprise and remote-first
environments. Extensive experience working with both bare-metal and cloud-based solutions,
including legacy-to-modernization transitions and multi-environment orchestration.
Currently open to full-time remote positions under gig-based/contract models or Ukrainian
employment law (No PE).

Core Skills
• Containers & Orchestration: Kubernetes (Kubespray, Rancher, Tanzu, Helm), Docker,
Podman
• Infrastructure as Code: Terraform, Ansible, AWX, Packer, Vagrant
• CI/CD: GitLab CI, ArgoCD, Jenkins
• Cloud Platforms: AWS, Azure, GCP, IBM Cloud
• Monitoring & Observability: Prometheus, Grafana, Loki, ELK, Zabbix
• Scripting & Automation: Bash, Python
• Virtualization: KVM, VMware, Xen, Hyper-V
• Databases: MySQL, PostgreSQL, Redis, MongoDB
• Version Control & Repositories: Git, GitLab, Nexus

Professional Experience
Senior DevOps Engineer
Mascode — Feb 2025 – Present
• Built and maintained Kubernetes clusters using Kubespray, Rancher, and Tanzu
• Delivered production-grade clusters and CI/CD pipelines under critical SLA requirements
 • Deployed GitLabCE with custom Runners, performed full GitLab-to-GitLab migrations
• Built GitOps foundation using ArgoCD and custom Helm charts for all services
• Deployed and maintained Nexus with automated backups
• Managed legacy infrastructure on Docker and VMware virtual machines
• Deployed and maintained dual monitoring stacks across three environments
• Implemented full-cycle observability stack (Prometheus, Grafana, Loki, ELK) including
Java metrics for Grafana
• Handled complex multi-tenant and multi-environment delivery pipelines
• Successfully supported hybrid legacy and modern workloads, bridging Docker-era setups
with Kubernetes-native infrastructure
Senior DevOps Engineer
[NDA Company] — Feb 2022 – Feb 2025
• Managed multi-region AWS infrastructure via Terraform and Ansible
• Built CI/CD pipelines integrating GitLab CI and ArgoCD
• Deployed and scaled Rancher clusters, maintained GitLabCE and Nexus
• Participated in secure delivery and compliance for enterprise workloads
Senior DevOps Engineer
Luxoft — Apr 2021 – Feb 2022
• Designed scalable CI/CD systems across AWS and Azure
• Used Helm and Terraform for k8s-based infrastructure automation
• Supported cloud-native app delivery in regulated environments
Senior DevOps Engineer
GlobalLogic — Aug 2019 – Mar 2021
• Deployed K8s clusters with Kubespray and Kops
• Implemented Ansible/Terraform automations for hybrid clouds
Senior DevOps Engineer
SoftServe — Feb 2018 – Aug 2019
• Migrated legacy applications to Kubernetes
• Designed and executed CI/CD flows via Jenkins and GitLab CI
DevOps / SysOps / TechOps Engineer
[NDA Client] — Sep 2016 – Feb 2018
• Administered Linux environments, automated cloud provisioning
• Provided incident response for production systems on AWS
L3 Support Engineer
Zone3000 — Jul 2013 – May 2016
• Maintained mixed hosting infrastructure (cloud/dedicated)
• Created automation tools and internal deployment workflows
Deployment Engineer (OpenStack)
Mirantis — Feb 2012 – Oct 2012
• Built OpenStack HA environments
• Automated infrastructure deployment with scripting tools
Leading Engineer
Ukrtelecom — May 2006 – Jan 2011
• Maintained national transport and backbone infrastructure (DWDM, SDH, DSLAM)
• Trained and supervised junior engineers

Education
Master's in Information Networks & Communications
Kharkiv National University of Radio Electronics