Senior Windows & Linux Server Administrator · Automation & DevOps Engineer
Windows (.EXE) & Android Application Developer · Cyber Security & PCI DSS Analyst
Prague, Czech Republic · github.com/GinCz · linkedin.com/in/gincz
Hi, I'm VladiMIR (aka GinCz) — a Senior Systems Architect, Infrastructure Engineer, and Software Developer with 20+ years of hands-on experience managing high-availability enterprise environments, designing secure network perimeters, and building native desktop and mobile applications.
- 🛡️ Cyber Security & Compliance: Certified PCI DSS Analyst, GDPR compliance auditor. Creator of IPGuard — an advanced multi-layer security framework (ipset + CrowdSec + Fail2Ban) with Cloudflare WAF integration.
- 🖥️ Enterprise Server Infrastructure: Deep expertise in Windows Server (2000–2025) and Linux (Ubuntu LTS, Debian, RHEL) across bare-metal, VMware ESXi, Hyper-V, AWS EC2, and Oracle Cloud (OCI).
- 🔑 Directory & Identity Services: Comprehensive administration of Active Directory (AD DS), Group Policy Objects (GPO for 2,000+ users), Microsoft 365, Entra ID (Azure AD), and Remote Desktop Services (RDS / Terminal Server).
- 🪟 Native Windows Software Engineering (.EXE): Architecture and compilation of standalone, zero-dependency Windows desktop tools, network diagnostic suites, and background system services in Go (Golang), C# (.NET / WPF / WinForms), Python, and PowerShell GUI (Win32 API, Windows Socket API, Windows Filtering Platform).
- 📱 Mobile Application Development (Android): Native Android apps in Kotlin & Java using Android Jetpack and Clean Architecture. Automated remote headless build & signing pipelines powered by Gradle daemons producing production APK and AAB artifacts.
- ⚡ Perimeter & CDN Protection: Enterprise Cloudflare infrastructure: WAF rules, DDoS mitigation, Bot Management, SSL/TLS, DNSSEC, and automated 10/10 email deliverability (SPF, DKIM, DMARC) across 20+ domains.
- 🔐 Encrypted Networking & VPNs: Advanced deployment of modern VPN architectures including Xray (VLESS / Reality), WireGuard, AmneziaWG, and OpenVPN.
- 🗄️ Distributed Storage & Databases: Multi-node Samba (SMB2+) networked storage systems, performance tuning and automated cloud backup/disaster recovery for Microsoft SQL Server, PostgreSQL, and MySQL (70% RTO reduction).
- 🤖 DevOps & AI Workflows: Automated CI/CD pipelines via PowerShell 7, Bash, Python, Docker, GitHub Actions, and integration of AI agentic workflows and indexed knowledge bases.
| Domain | Technologies & Frameworks |
|---|---|
| Server Operating Systems | Windows Server (2000–2025), Ubuntu Linux (24 LTS), Debian, RHEL, CentOS |
| Virtualization & Cloud | VMware ESXi / vSphere, Microsoft Hyper-V, AWS EC2, Oracle Cloud (OCI), Docker |
| Enterprise Identity & Access | Active Directory (AD DS), GPO (2,000+ users), Entra ID (Azure AD), Microsoft 365, RDS, Citrix |
| Cyber Security & Compliance | PCI DSS Certified Analyst, GDPR audits, IPGuard, CrowdSec IPS, Fail2Ban, iptables, ipset, Penetration Testing |
| Perimeter & WAF | Cloudflare (WAF, DDoS, Bot Management, DNSSEC, SSL/TLS, Zero Trust), Fortinet, UniFi |
| Windows Desktop Dev (.EXE) | Go (Golang), C# (.NET / WPF / WinForms), Python, Win32 API, Windows Filtering Platform (WFP), Inno Setup |
| Mobile Development (Android) | Kotlin, Java, Android Jetpack, Coroutines, Remote Headless Gradle Build Pipelines, APK / AAB signing |
| VPN & Encrypted Protocols | Xray (VLESS / Reality), WireGuard, AmneziaWG, OpenVPN, L2TP/IPsec |
| File Sharing & Storage | Samba (SMB2+) multi-node infrastructure, ACL permissions, cross-cloud sync |
| Databases & Disaster Recovery | Microsoft SQL Server, PostgreSQL, MySQL, Automated Cloud Backup & Fast Recovery (70% RTO cut) |
| Scripting & Automation | PowerShell 7, Bash, Python, Batch / CMD, GitOps, GitHub Actions |
| Monitoring & Observability | Uptime Kuma, Netdata, Elastic Stack (ELK), Zabbix, Glances |
| AI & Knowledge Engineering | AI Agentic Workflows, Token Economy Optimization, MS Teams Copilot & Confluence knowledge base indexing |
Production-ready scripts and configurations for Linux (Ubuntu 24 LTS) server administration.
- IPGuard: Multi-layer IP security system combining ipset blacklists, CrowdSec IPS, and Fail2Ban.
- Cloudflare Integration: Automated edge firewall sync, Bot Management, and SSL automation.
- VPN Automation: Deployment and hardening of Xray (VLESS/Reality), WireGuard, and AmneziaWG protocols.
Windows utility scripts and automation for diagnostics, optimization, benchmarking, and network storage management.
- Samba SMB Automation: Multi-server connection scripts with color-coded health and mount status reports.
- System Administration: PowerShell 7 and Batch diagnostics, service tuning, and automated maintenance routines.
🤖 AI
Master AI architecture, prompt engineering, multi-model workload routing, and token economy standards.
- Token Economy Standards: Efficient context management, zero-waste patterns, and model routing guides.
- Agentic Workflows: Automation pipelines for LLM integration, knowledge indexing, and autonomous execution.
Scalable software architecture patterns, infrastructure-as-code manifests, and high-availability design principles.
- 🔗 GitHub: github.com/GinCz
- 💼 LinkedIn: linkedin.com/in/gincz
- 📧 Email: gin@volny.cz
- 📍 Location: Prague metropolitan area, Czech Republic
- 🤝 Engagement Model: B2B Contract (Czech s.r.o. / IČO), Remote / Hybrid, Senior Engineering & Consulting
