Senior Linux System Administrator / Infrastructure Engineer
Linux • Apache • Nginx • PHP • MySQL • Docker • Proxmox • VPN • VoIP
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Senior Linux System Administrator with 15+ years of experience working with Linux servers, networks, VoIP and web infrastructure. Experience supporting high-load web projects, Asterisk/Vicidial, VPN, hosting and corporate systems, call centers, as well as freelance projects for small and medium businesses, setting up comprehensive monitoring, optimizing security through Cloudflare and automating backups, supporting technical documentation.
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Key competencies and technical skills:
Web project administration: Managing hosting, VPS/VDS, databases, control panels (cPanel, ISPmanager, FastPanel, etc.).
Network services and DNS: Knowledge of working with Cloudflare (managing DNS records, SSL/TLS, configuring Firewall/WAF rules, Page Rules, optimizing caching and DDoS protection).
Monitoring and alerting: Setting up and working with monitoring systems (Zabbix or similar), event correlation to minimize notification "noise", log analysis.
Mail services: Setting up corporate mail, managing MX, SPF, DKIM, DMARC records to protect against spam and ensure email deliverability.
Recovery and backup: Developing backup strategies, regularly checking their integrity and ensuring smooth site migration.
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Linux & Infrastructure
- Linux (Debian, Ubuntu, CentOS)
- Bash
- System Administration
- Infrastructure Management
- Performance Tuning
Web Infrastructure
- Apache/Nginx
- PHP-FPM
- MySQL/MariaDB
- LAMP/LEMP
- PHP
- WordPress
- HTML/CSS
Virtualization & Containers
- Proxmox VE
- Docker
- Docker Compose
- Virtual Machines
- Containerized Services
DevOps & Automation
- Git/SVN
- CI/CD
- Bash Scripting
- Python (automation and integrations)
Networking
- TCP/IP
- VLAN
- VPN
- OpenVPN
- WireGuard
- XRay/V2RayNG
- MikroTik
- EdgeRouter
- UniFi
Mail Infrastructure
- Postfix/Exim
- Dovecot
- Roundcube
VoIP
- Asterisk
- Vicidal/Vicibox
- FreePBX
- SIP
- GoIP/Elgato/OpenVox GSM Gateways
Monitoring
Microsoft Infrastructure
- Windows Server 2008/2012/2022
- Active Directory (AD)
- Group Policy (GPO)
- DNS
- DHCP
- Remote Desktop Services (RDS)
- File Services
- User Administration
- PowerShell
- Windows Administration Automation
Additional Technical Experience / Volunteer IT Support Engineer
- Deployment and maintenance of CCTV systems and DVR/NVR equipment
- Video surveillance infrastructure troubleshooting and support
- Network infrastructure setup and support
- Broadcast setup / Organization and support of online broadcasts
- Working with vMix, NDI, Dante
- Server administration
- Audio equipment setup and technical support of events
