Oleksandr D.

DevOps / SRE engineer · 20 years in Linux & infrastructure · Top Rated Plus, 100% Job Success, 300+ projects I'm a DevOps / Site Reliability Engineer with production experience at GoDaddy (since 2017). Before that, I led a team of system administrators running mission-critical infrastructure. On Upwork I've completed 300+ projects and nearly 10,000 hours for startups, agencies and small businesses. Many clients have kept me on for 3 to 9 years. What clients hire me for: ▪ Emergency fixes: server down, site hacked, 502 errors, broken SSL, DNS or email. Fast diagnosis, root cause, permanent fix. ▪ Server & cloud migrations: AWS, GCP, DigitalOcean, Hetzner, OVH, Linode. Low- or zero-downtime moves, including AWS → GCP. ▪ CI/CD & automation: GitHub Actions, GitLab CI, Ansible, Docker, push-to-deploy workflows. ▪ Ongoing sysadmin / SRE support: updates, hardening, monitoring (Prometheus, Grafana, Zabbix), backups, performance tuning. ▪ Security: malware and hacked-site cleanup, Cloudflare WAF and DDoS rules, firewalls, VPN. ▪ Web hosting stacks: Nginx/Apache, PHP, MySQL/MariaDB/PostgreSQL, Postfix/Exim, cPanel/WHM, Plesk, Virtualmin. Tech: Linux (Debian, Ubuntu, CentOS/AlmaLinux/RHEL, FreeBSD) · AWS · GCP · DigitalOcean · Hetzner · Docker · Kubernetes · Terraform · Ansible · GitHub Actions · GitLab CI · Prometheus · Grafana · Zabbix · Cloudflare · Bash · Python "We highly recommend Oleksandr to anyone who's in need of an expert sysadmin." (Upwork client, 4-year contract) How I work: clear written updates, short notes on what I changed and why, and I'm reachable when production is down.