Serhii

SERHII VERETUN
Junior DevOps Engineer

Location: Kharkiv, Ukraine (open to relocation) Email: [відкрити контакти](див. вище в блоці «контактна інформація») Phone: [відкрити контакти](див. вище в блоці «контактна інформація»)
LinkedIn: [відкрити контакти](див. вище в блоці «контактна інформація») GitLab: gitlab.com/veretunsergej

PROFESSIONAL SUMMARY

Junior DevOps Engineer with practical experience in Linux system administration, Infrastructure as Code, container orchestration, and CI/CD automation. Proven track record designing
reproducible cloud environments (AWS, OCI) with Terraform, running containerized workloads on Kubernetes, and automating deployments via ArgoCD. Strong troubleshooting background,
production-first mindset, and full working proficiency in English (C1).

TECHNICAL SKILLS

Cloud & Infrastructure as Code: AWS, Oracle Cloud Infrastructure (OCI), Terraform, Ansible

Containers & Orchestration: Docker, Docker Compose, Kubernetes, ArgoCD (GitOps)

CI/CD & Version Control: GitLab CI, GitHub Actions, Git

Systems & Networking: Ubuntu Server, Bash, Python, NGINX, Caddy, DNS, TCP/IP, SSL/TLS

Monitoring & Observability: Prometheus, Grafana, Node Exporter, Log Rotation

WORK EXPERIENCE

Music Factory
Junior DevOps Engineer (Contract) | Oct 2025 – Present
• Modularized multi-cloud infrastructure across AWS and OCI using Terraform, standardizing VPC network topologies, security groups, and IAM policies across development and production
environments.
• Refactored GitLab CI/CD pipelines by introducing dependency caching, isolated test stages, and automated container image linting, reducing build times from 16 minutes to under 4 minutes.
• Migrated multi-service web applications from standalone Docker Compose setups to Kubernetes, configuring ArgoCD to enforce declarative GitOps synchronization and enable rolling
updates without service downtime.
• Integrated Prometheus and Grafana dashboards for cluster and host metrics, configuring automated alert thresholds for memory exhaustion and crash loops, which decreased incident triage
time by 40%.
• Automated baseline server provisioning and routine maintenance across Ubuntu nodes with Ansible playbooks, eliminating configuration drift across hosts.
• Configured edge ingress and reverse proxying via NGINX and Caddy with automated Let's Encrypt SSL/TLS renewals, maintaining high availability for external endpoints.

FEATURED PROJECTS

GitOps Cloud Infrastructure & Kubernetes Lab
Personal Project | Sep 2024 – Present
• Built a repeatable infrastructure lab deployed via Terraform on cloud virtual machines and bare-metal nodes.
• Implemented declarative application deployment to Kubernetes using ArgoCD, separating application code from configuration manifests.
• Hardened self-hosted GitLab CI runners by implementing automated Docker image security scanning and secret hygiene checks prior to registry publishing.
• Configured node-level monitoring and custom metrics collection to test cluster autoscaling behavior under simulated traffic spikes.

Multi-Tier Application Delivery Platform
Platform Project | Jun 2024 – Sep 2024
• Automated the local and staging lifecycle for a platform combining a FastAPI backend, React client interfaces, and an aiogram Telegram bot using Docker Compose.
• Developed Bash and Python automation scripts for scheduled PostgreSQL database backups, integrity verification, and remote storage upload.
• Configured isolated GitLab runner environments to prevent build artifact cross-contamination between test and production deployments.

EDUCATION

National Aerospace University "Kharkiv Aviation Institute" (KHAI)
• Bachelor of Science in Information Systems and Technologies | 2024 – Present
• Relevant Coursework: Operating Systems, Computer Networks, Linux Administration, Algorithms, Higher Mathematics.

LANGUAGES

English: C1 (Professional Working Proficiency) | Ukrainian: Native