Infrastructure & Systems Administration
Building robust infrastructure and solving practical problems.
Dedicated IT administrator and network specialist. Focused on secure, reliable server management, automation, and operational efficiency.
Focus Areas
Infrastructure & Servers
Designing, deploying, and maintaining Linux and Windows environments for maximum uptime and reliability.
Networking & Support
Managing network architecture, routing, VPNs, and providing advanced technical support and troubleshooting.
Security & Hardening
Implementing security best practices, secure remote access, and fundamental system hardening.
Automation & Monitoring
Streamlining operations with Python scripts and ensuring visibility through comprehensive service monitoring.
Selected Work
Self-Hosted VPS Architecture
Context
A requirement for a private, reliable ecosystem of self-hosted services without relying on public cloud SaaS.
Approach
Deployed a containerized environment using Docker. Managed reverse proxies with Nginx, secured traffic via Let's Encrypt, and isolated internal databases and applications.
Outcome
A highly resilient, private stack running communication platforms, file storage, and mail services with full data sovereignty and low resource footprint.
Secure Remote Access & Hardening
Context
Critical infrastructure required secure administration access while mitigating automated brute-force attacks and unauthorized entry.
Approach
Disabled password authentication globally in favor of strict SSH key pairs. Implemented non-standard ports, configured strict firewall rules (UFW/iptables), and applied fail2ban policies.
Outcome
Dramatically reduced attack surface, eliminating unauthorized login attempts while maintaining seamless administrative access.
Operational Visibility & Scripting
Context
Lack of real-time insight into server health led to reactive troubleshooting instead of proactive maintenance.
Approach
Deployed lightweight monitoring agents across nodes. Developed simple Python automation scripts to perform routine health checks and log parsing.
Outcome
Improved operational visibility, enabling early detection of resource exhaustion and reducing overall system downtime.
Technologies & Core Skills
About
I am a Czech-based IT Administrator and Network Specialist with a deep interest in remote work, quality assurance, infrastructure, and technical operations.
My approach is rooted in practicality: I focus on building systems that are stable, secure, and easily maintainable. From troubleshooting complex network issues to managing Linux environments and deploying Dockerized applications, I value precision and reliability over over-engineered solutions.
Note: I actively integrate modern AI-assisted workflows into my daily operations to accelerate research, iterate faster, and efficiently resolve complex technical challenges.
Contact
Interested in collaboration or need more details?
info@sysgate.czA detailed CV and further context on my technical background are available upon request.