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DevOps engineer

City:
Kyiv

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Hennadii Rumiantsev
DevOps Engineer
Kyiv, Ukraine | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)

PROFILE
DevOps Engineer with 5+ years in IT infrastructure, now running production Kubernetes & OpenShift (99.9% SLA,
10,000+ daily users) on a national government registries platform. Hands-on with Terraform, Ansible, CI/CD,
monitoring and HashiCorp Vault. Certified Kubernetes Administrator (CKA) and HashiCorp Terraform Associate.

CERTIFICATIONS
CKA — Certified Kubernetes Administrator (CNCF / Linux Foundation), 2026 — ID LF-wd5k8fhnr1
HashiCorp Certified: Terraform Associate (004), 2025 — ID d11ff6af-66d3-4dda-a785-8c6e4a3c6239

TECHNICAL SKILLS
Orchestration & Containers: Kubernetes, OpenShift, k3s, Docker, Helm
CI/CD & IaC: Jenkins, GitLab CI, ArgoCD, Terraform, Ansible
Monitoring & Security: Prometheus, Grafana, Zabbix, HashiCorp Vault (PKI), Keycloak (OIDC)
OS, DB & Networking: Linux (Ubuntu/RHEL/CentOS), Proxmox, PostgreSQL, Redis, Nginx, Traefik
Scripting & VCS: Bash, Python, PowerShell, Git, Nexus

WORK EXPERIENCE

DevOps Engineer 07.2024 — present
SE “Ukrainian Special Systems” — national government registries platform
Administer production Kubernetes & OpenShift clusters at 99.9% SLA for critical government infrastructure
(10,000+ daily users)
Deployed HashiCorp Vault (PKI) in k3s for internal certificate management; integrated Keycloak (OIDC) for service
auth
Optimized Jenkins & GitLab CI pipelines, cutting release time by 15%; built Prometheus + Grafana + Zabbix
monitoring with alerting
Managed PostgreSQL under high load; configured Nginx/Traefik for load balancing and SSL termination;
automated ops with Python & Bash
System Administrator 02.2024 — 07.2024
SystemGroup Ukraine — POS solutions for retail
Deployed software fiscal registrar (PPO) on Linux, Windows and Docker; automated deployment with Bash &
PowerShell
Handled 15–20 support tickets daily with a 95% resolution rate within SLA
System Administrator 02.2021 — 01.2024
Kyiv College of Communications — IT infrastructure, 200+ users
Administered Linux & Windows Server; built a Proxmox lab; automated configuration of 10+ servers with Ansible
Deployed Thin Client environment and corporate IP telephony (20+ extensions); provided HelpDesk to 200+ users

EDUCATION
Bachelor's — Computer Engineering (spec. 123) 2024 — 2027 (in progress)
Junior Bachelor's — Cybersecurity (spec. 125) 2020 — 2024

LANGUAGES
Ukrainian — native | English — B1+ (working proficiency in technical contexts)

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