Roman O.

🔹 Summary

Experienced System Administrator and DevOps Engineer with strong expertise in Linux server management, virtualization, networking, databases, monitoring, and security. Skilled in deploying and optimizing complex infrastructures, automating workflows with CI/CD, and ensuring high performance and reliability for web and application servers.

Proficient in configuring monitoring and error-tracking tools, managing databases, and deploying multi-service architectures. English proficiency sufficient for technical documentation and international communication.

🔹 Core Competencies

🖥 Server & Infrastructure Management

• Linux administration: Debian, Ubuntu, CentOS, AlmaLinux, Mikrotik

• Hardware selection and configuration for performance and reliability

• Kernel updates, package management, troubleshooting

• IPMI server management

• RAID setup, disk replacement, multi-server management

• Full server setup without control panels (mail, web, proxy, databases)

📊 Monitoring & Observability

• Zabbix, Grafana, Prometheus, Graylog

• ELK Stack (Elasticsearch, Logstash, Kibana)

• Sentry

• Real-time monitoring, alerting, dashboards, performance optimization

• Application-level monitoring: Laravel Telescope, Laravel Pulse, Laravel Horizon

🗄 Databases

• MySQL, MariaDB (InnoDB, MyISAM): optimization, table recovery, import/export

• PostgreSQL: installation, configuration, replication, performance tuning

• PgBouncer connection pooling

• Memcached & Redis: caching, queue management, session handling

🌐 Networking & Web Servers

• Network interfaces configuration, routing, firewalls (iptables)

• Apache & Nginx: web hosting, reverse proxy, FastCGI/FPM integration

• CGI / FastCGI performance optimization

• Cloudflare configuration and web application protection

🔐 Security & Performance

• Detection and mitigation of DoS attacks (SYN flood, multi-IP attacks)

• Per-user resource consumption monitoring and optimization

⚙️ Virtualization & Automation

• KVM / OpenVZ virtualization: setup and maintenance

• Docker: multi-PHP environments, databases, microservices, workers

• CI/CD pipeline design and automation

🧩 Control Panels & Windows Server

• VMmanager (KVM/OpenVZ)

• cPanel, Plesk, VestaCP, HestiaCP, DirectAdmin, aaPanel, BrainyCP, ISPmanager

• Windows Server 2008–2025: password recovery, disk expansion, VM management

🌍 Languages

• English — technical reading and professional communication