Contact information

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Work experience

System Engineer

from 12.2021 to 09.2025 (3 years 10 months)
HappyGamer, Дистанційно (IT)

- Designed and operated MariaDB HA (replication/Galera), implemented backups with verified restores (Disaster recovery plan for each "env")

- Deployed MongoDB ReplicaSet with TLS/mTLS and Envoy proxy (auto-primary detection, read/write split), scaled with no downtime.

- Ran WebCluster (Apache/Nginx behind Cloudflare): WAF, caching, SSL/TLS, improved TTFB.

- Automated delivery via GitLab CI/CD (BuildKit, multi-stage, artifacts, environments) + Helm. Zero/Low-downtime releases.

- Containerized services with Docker & Kubernetes/MicroK8s: requests/limits, HPA, jobs/cron; unified Helm charts.

- Administered Proxmox

- RAID 0/1/5/6/10 setup, disk replacement, SMART/firmware, burn-in. Clear procedures and documentation.

- Ansible automation: roles for Nginx/Apache, MongoDB, Envoy, Certbot (Cloudflare DNS), system hardening; idempotent workflows.

- Prometheus/VictoriaMetrics, Grafana, Alertmanager, Sentry actionable alerts, on-call, silences/escalations.

- Security and networking: end-to-end TLS/mTLS, iptables/UFW, Fail2ban, VPN/tunnels, Cloudflare DNS automation.

- DR/Backups: centralized backups (NFS/S3), retention policies, regular recovery drills, and runbooks.

- Performance troubleshooting: kernel/logging tuning during OOM storms, reduced tooling/UI stalls.

System Engineer

from 09.2019 to 12.2021 (2 years 4 months)
MojoHost | Sep 2019 - Dec 2021, Дистанційно (IT)

- Communication with clients
- Troubleshooting application and server-side problems
- Migration and consolidation of different environments
- Virtualization: SolusVM, ProxMox
- Working with different RAID types and levels
- Load balancing and replication

Technical Support Engineer

from 07.2017 to 09.2019 (2 years 3 months)
Quadranet | Jul 2017 - Sep 2019, Дистанційно (IT)

- Communication with clients
- Support customer servers and environment
- Monitoring customer services and servers
- Solve Network issues
- Working with different RAID types and levels

Technical Support Engineer

from 12.2015 to 07.2017 (1 year 8 months)
CloudLinux| Dec 2015 - Jul 2017, Дистанційно (IT)

- Handle customer requests via Kayako/Zend Desk Ticket System
- Troubleshooting application and server-side problems

Technical Support Engineer

from 07.2013 to 12.2015 (2 years 6 months)
Remsys| Jun 2013 - Dec 2015, Дистанційно (IT)

- Remote administration of the customer servers and applications
- Monitoring customer services and servers
- Handle customer requests via Kayako Ticket System

System Engineer

from 09.2012 to 07.2013 (11 months)
MKT Zaporizhzhya| Sep 2012 - Jun 2013, Запоріжжя (Телекомунікації, зв'язок)

- Windows and Linux-like operating systems
- Apache/Nginx Web Services
- Optimize work of web applications
- MySQL and cached applications
- Failover cluster based on the Windows Server 2012 + Hyper-V
- VoIP system based on the cisco CUCM/CCX
- Proxmox virtualization
- Cisco switches and routers

System Engineer

from 03.2010 to 08.2012 (2 years 6 months)
Avito Svit / Svit Traiding | March 2010 - Aug 2012, Запоріжжя (Оптова торгівля, дистрибуція, імпорт, експорт)

- Administration of local network and network equipment
- Maintenance Windows Servers 2008R2/FreeBSD operating system (Active Directory, DNS, VPN, GPO)
- Remote administration of the company branches
- Configure and maintenance corporate antivirus Symantec
- Configure Hyper-V virtualization
- Administration Mail Exchange server

System Engineer

from 09.2007 to 03.2010 (2 years 7 months)
Computer Academy Step | Oct 2007 - Mar 2010, Запоріжжя (IT)

- Administration local network and network equipment
- Configure and maintenance MDT2010/WDS
- Configure Web cluster based on CentOS system
- Administration FreeBSD operating system
- Automatic Telephone System
- Administration of the Cisco and D-Link network switches
- Configure Active Directory, GPO, RDP

Education

НФ ОМУРЧ "Украина

Экономический, Специалист, Николаев
Higher, from 2007 to 2011 (4 years)

КА "ШАГ"

Системное Администрирование, Запорожье
Specialized secondary, from 2007 to 2009 (2 years)

Knowledge and skills

• Docker
• Git
• BASH
• MySQL
• AWS
• Python
• Nginx
• Ansible
• Kubernetes
• VMware
• Jenkins
• SQL
• Організованість
• DHCP

Language proficiencies

English — above average

Additional information

P E R S ONA L P RO F I L E
With more than 15 years of various Unix and Windows systems administration experience, I am looking for a job to use my current skill set

S K I L L S
OS & Platforms: Ubuntu, CentOS/Alma/Rocky, Windows Server
Containers & Orchestration: Docker, Docker Compose, Kubernetes (K8s/MicroK8s), Helm
CI/CD & IaC: GitLab CI/CD, GitHub Actions, Ansible, BuildKit/Kaniko, Artifacts/Environments
Web, Proxy & Edge: Nginx, Apache (php-fpm/mod_lsapi), Cloudflare (DNS/WAF/CDN), HAProxy, Envoy (TLS/mTLS)
Databases & Caching: MariaDB/MySQL, MongoDB (ReplicaSet/TLS/Backups), Redis
Observability & Alerting: Prometheus/VictoriaMetrics, Grafana, Alertmanager, Sentry, Loki/Logs
Security & Networking: SSL/TLS, mTLS, iptables/UFW, Fail2ban, DNS, rate limiting, hardening, WAF tuning
Infrastructure & Virtualization: Proxmox (KVM/LXC), VMware, KVM, RAID (0/1/5/6/10), SMART/firmware
Process & Runtimes: PM2, systemd, Node.js runtime ops
Email & SMTP: Postfix, Dovecot, Sendmail (basic ops)
Cloud & GitOps: AWS (EC2/S3), ArgoCD (GitOps), backups/DR planning
Scripting: Bash, Python (утиліти, watchdogs, health-checks)

C ON T A C T D E T A I L S
Chernomorsk, Ukraine
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