System Administrator

Delivering High-Performance

IT Infrastructure and Systems Administrator with hands-on experience managing enterprise environments, 900+ Linux machines, networking, security (NIS2), and technical operations. Experienced in administering Layer 1-3 networks, switches, firewalls, hosting environments, L3 support, and Python web development.

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7+
Years Experience
900+
Projects Shipped
99.9%
System Uptime Rate
ST

Stefan Tsvetanov

System Administrator

Sofia, Bulgaria / Remote Worldwide
stefantsvetanov.com
Linux, Windows, Networking, Fortigate, Bash, Python
Tech Stack

Technical Expertise

Backend & Systems

GNU / Linux Systems Admin (900+ Nodes) 98%
Python & Python Web Development 92%
Django Web Framework 90%
Server Administration & Hosting Environments 96%
Shell / Bash Scripting & Automation 94%
L3 Technical Support & Incident Mgmt 95%

Architecture & Tools

Hardware Deployment & Troubleshooting 96%
Ticketing Systems & Account Mgmt 94%
High Availability & Infrastructure Reliability 95%

DevOps & Cloud Infrastructure

Network Architecture & Layer 1-3 Protocols 96%
Switches, Firewalls & Router Config 94%
Cybersecurity & NIS2 Compliance Standards 90%
Network Services (DNS, DHCP, VPN, SSH) 95%
HIKVISION & Dahua CCTV Multi-Tenant Admin 92%

Databases & Data Engineering

PostgreSQL & SQLite Databases 88%
Nginx & Web Server Hosting 92%
Portfolio

Featured Work & Case Studies

A selection of recent production systems, web applications, and architecture projects I've built.

Infrastructure & SysAdmin

Enterprise 900+ Linux Node Management & Monitoring System

High-availability infrastructure for centralized monitoring, automated patch management, and health tracking across 900+ Linux machines.

GNU/Linux Bash Automation Network Services NIS2 Firewall
Django Web Development

Personal Web Portal & CV System (stefantsvetanov.eu)

Full-stack Django web application serving as an interactive resume, portfolio showcase, technical blog, and contact management platform.

Python Django HTML5/CSS3 JavaScript SQLite Nginx
Security & Hardware

Multi-Tenant CCTV Surveillance & Access Control Network

Integrated multi-tenant CCTV and access control administration covering HIKVISION and Dahua hardware across enterprise facilities.

HIKVISION Dahua Network VLANs Hardware Admin L3 Support
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