Denis Kondratiev

DevOps Engineer — Infrastructure & Platform Reliability
maildenis@kondratiev.net
tel+380 50 171 0225
locUkraine

DevOps engineer maintaining the infrastructure behind a high-traffic iGaming and affiliate marketing platform: multi-cloud Terraform, a 50+-role Ansible fleet, and the observability, database, and VPN systems that keep dozens of consumer-facing brands online. Comfortable owning a change end-to-end — from ticket, to reviewed Terraform plan, to verified rollout. Based in Ukraine; kept delivery uninterrupted through wartime disruptions since 2014.

Experience

DevOps Engineer Nov 2023 — Present
iGaming / Affiliate Marketing Platform

Infrastructure as Code

  • Manage multi-cloud DNS and edge infrastructure in Terraform across Cloudflare, Hetzner Cloud, and OVH — 800+ zones, WAF and rate-limiting policy, custom hostnames, and enterprise CDN onboarding for dozens of consumer-facing brands.
  • Build and maintain a 50+-role Ansible fleet covering frontend/backend app servers, databases, proxies, and monitoring nodes, with separate inventories for dev, staging, and production.

Observability & Reliability

  • Run the monitoring stack end to end: Prometheus and Grafana for metrics, Loki/Alloy/Promtail for log aggregation, Tempo for tracing, and Blackbox/node/MySQL/Redis exporters for external and host-level checks.
  • Built automated status pages — inventory, VPN users, Cloudflare stats, alert digests — generated and redeployed on every change via CI.

Data & Messaging

  • Operate MySQL/Percona clusters alongside ClickHouse, Kafka, RabbitMQ, and Redis/Valkey services.

Networking & Access

  • Administer Pritunl VPN with org-scoped access control across a dozen business units, plus WireGuard and iptables.
  • Manage Cloudflare WAF/rate-limit policy and Squid whitelisting, generating and shipping PAC files through CI on every relevant change.

CI/CD & Automation

  • Maintain a GitLab CI pipeline — path-scoped builds, tests, and deploys.
  • Write Bash/Python tooling for general work automation, geo-routing checks, and documentation publishing.

Previous Experience

DevOps Engineer Oct 2022 — Nov 2023
FinTech

SDLC and release-engineering support for a regulated banking & capital-markets team: environments, pipelines, and deployment tooling inside a large enterprise IT-services setup.

Head of IT Sep 2018 — Oct 2022
National Retail & Wholesale Group

Owned IT end to end across the group: ERP rollout, a warehouse management system, a new logistics center, and a mobile app, plus the cross-department automation and management accounting behind them.

Head of IT May 2017 — Aug 2018
Food-Manufacturing Plant

Introduced modern IT practices and led ERP system development, managing a team of on-site staff and contractors.

System Administrator → Head of IT Jan 2007 — May 2017
Regional Retail & Wholesale Distributor

Grew from hands-on sysadmin work into department leadership over a decade, building the company's IT infrastructure and management-accounting systems from the ground up, including an in-house-to-colocation server migration with minimal downtime.