Viktor "Yamiru" Vasko is a Linux sysadmin freelancer and firefighter based in Košice, Slovakia, with 11+ years fixing server crashes, stabilising game hosting platforms and managing Discord communities for clients across Slovakia, Czechia and the wider EU.
Fix server crashes, downtime and performance issues - fast.
When your infrastructure breaks at 3am, I get it back online - like when I restored a 3,000-player cluster in under 15 minutes, before player loss escalated into churn and revenue drop.
Linux sysadmin freelancer · Nginx / Apache / Docker · game servers · Discord setup · Slovakia / EU
I step in when servers crash, data is at risk, or performance kills your users - and fix it without downtime or guesswork.
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I fix broken servers, debug Nginx and Apache, manage game hosting, and set up Discord communities - so you don't lose users, revenue or sleep over infrastructure.
| Domain | Primary Tools | Years Active | Projects Delivered |
|---|---|---|---|
| Linux Administration | Debian, Ubuntu, CentOS, Rocky Linux | 11+ | 20+ servers managed |
| Virtualization | Proxmox VE, Docker, LXC | 6+ | 15+ VM clusters |
| Web Development | PHP, MySQL, WordPress, Nginx | 11+ | 7 live gaming sites |
| Game Servers | Minecraft, Hytale, Pterodactyl | 8+ | 4 Hytale plugins shipped |
| Security | Fail2Ban, iptables, SSL/TLS, DDoS | 7+ | Zero breach record |
Not the right fit if: you need on-site presence outside Slovakia, or 24/7 SLA-backed NOC coverage.
Better option: Hetzner or OVH for managed hosting at scale; regional IT firms for on-site work.
Still a fit? Let's talk about your project.
With over 11 years of experience in system administration and a parallel career as a professional firefighter at the Ministry of Defence of the Slovak Republic.
Specializing in Linux systems, server management, game hosting and PHP web development. Based in Košice, Slovakia - working remotely for clients across the EU and worldwide.
When your server goes down, you lose users, revenue, and trust. I fix it fast - and make sure it doesn't happen again. Here's what I do.
| Service | Stack | Typical scope | Not suitable for |
|---|---|---|---|
| Server Administration | Linux, Nginx, Apache, Docker, Proxmox | 1-20 servers | 100+ server enterprise farms |
| Game Server Hosting | Pterodactyl, Minecraft, Hytale | 1-10 game instances | AAA game publisher infrastructure |
| Web Development | PHP, MySQL, WordPress | SME websites, custom apps | React/Next.js SPA frontends |
| Discord Setup & Moderation | Discord bots, roles, moderation systems | New or existing servers, 100-50,000 members | Paid community monetization platforms |
| AI SEO Consulting | AiSeoModule, JSON-LD, llms.txt | PrestaShop & PHP projects | Magento / Shopify ecosystems |
When your server goes down, you lose users, revenue, and trust - I fix it fast and make sure it doesn't happen again. Linux (Debian, Ubuntu, CentOS, Rocky), Windows Server, Proxmox VE, Docker.
Optimized game servers with DDoS protection - Minecraft, Hytale, Rust, CS2. Pterodactyl Panel, SteamCMD, performance tuning for 3,000+ concurrent players.
Modern websites and web tools in PHP, MySQL, WordPress and PrestaShop. Author of AiSeoModule and 7 active websites.
Discord server setup, moderation systems, bots and community growth - from zero to 10,000+ members.
AI SEO 2026+ implementation: llms.txt, JSON-LD, IndexNow, AI discovery endpoints, GEO/AEO optimization. Get cited by ChatGPT, Claude, Perplexity and Google AI Overviews.
Server administration since 2015, firefighting since 2016 - both teach you to stay calm, prioritise fast, and fix the actual problem.
Professional firefighter and rescuer (military district). Responding to fire alarms and emergencies, fire prevention and OSH inspections, equipment and hydrant maintenance, incident scene analysis, detailed incident reporting, regular fire drills and fire-safety training.
Linux and Windows server management for hosting infrastructure. Proxmox VE virtualization, Docker, security audits, 20+ servers under management.
VPS and dedicated server management, web application deployment, database administration and performance tuning.
Warehouse operations in Hatfield, United Kingdom - loading and unloading pallets, moving stock with a forklift (operator licence obtained), maintaining computer records, meeting daily targets and health & safety standards.
Graduate internship: data entry of personal and corporate tax returns, maintaining accurate records in specialised software, evaluating data and processing prior-year tax reports.
Ran a local electronics shop (Hi-Fi, printers, cameras, PCs and laptops): sales and customer service, supplier negotiations, weekly invoicing, training and supervising 2 shop assistants, financial records in MS Access.
Free tool: HyTutorial Builder - browser-based config.json generator for the HyTutorial plugin. No registration, exports ready-to-use configuration.
Things I've built, shipped and actively maintain - from server tools to gaming platforms with real users.
Commercial PrestaShop module implementing AI SEO 2026+. Auto-generates 40+ SEO and AI discovery files: sitemap, robots.txt, llms.txt, JSON-LD, IndexNow. PrestaShop 8.2+/9.x.
Punishment management system for Hytale servers - ban, mute, kick, warn with full history.
Secure player-to-player item trading plugin for Hytale servers.
Multilingual chat censorship and filter plugin for Hytale servers.
Server tutorial system for Hytale - guide new players via /tutorial.
Modern PHP web interface for LiteBans - 17 languages, OAuth login. Open source.
Admin communication plugin for Minecraft servers.
Slovak/Czech Discord server directory with categories and voting.
International game server listing across multiple games.
Hytale plugins, packs and tutorials hub.
Gaming community identity toolkit - skin rendering and avatars.
European Hytale server list with live status.
Slovak Hytale community portal.
Home of VorqulBot (Discord bot for community management) and VorqulPanel (Linux hosting server control panel).
Real situations. What broke, how I fixed it, what changed.
3,000+ active players. Cluster failing under peak load. Every minute down = lost players and reputation.
Problem: Resource exhaustion cascading across nodes. Players getting kicked, data at risk.
Fix: Isolated failing node, redistributed load, restarted services in correct sequence.
Result: From cluster failure → fully online in under 15 minutes. Zero data loss. No repeat incident.
E-commerce site crashing every 12-18 hours. Client losing ~€2,000/day in sales. Previous provider couldn't find the cause.
Problem: Recurring crash every 12-18 hours, client losing business. Previous provider couldn't diagnose it.
Fix: Traced to a misconfigured OPcache interaction. Pool config rewritten, monitoring added.
Result: From crashes every 12-18 hours → zero crashes for 6+ months. ~€2k/day revenue recovered. Client on retainer since.
40,000+ login attempts/hour across 3 servers. One successful breach = all client data at risk.
Problem: 40,000+ login attempts per hour. Existing Fail2Ban config not catching distributed IPs.
Fix: Hardened SSH config, deployed geofencing, tuned Fail2Ban rules, rotated credentials.
Result: From 40k attempts/hour → zero successful logins. Attack neutralised in 2 hours. No breach since.
Details anonymised. Available to discuss specifics under NDA.
Quick answers about services, projects and availability.
Yamiru is the online alias of Viktor Vasko, a Slovak IT professional from Košice. He has managed Linux servers since 2015, served as a professional firefighter at the Ministry of Defence SR since 2016, develops Java plugins for Hytale and Minecraft, and is the author of AiSeoModule for PrestaShop. More about Yamiru.
Five core services: Linux/Windows server administration, game server hosting (Minecraft, Hytale, Rust, CS2), PHP web development, Discord community management, and AI SEO consulting. Remote-first, available across the EU and worldwide.
Four shipped plugins: HytaBans (punishment management, BuiltByBit), HytaTrade (player-to-player trading, CurseForge), HyCensor (chat filter, CurseForge) and HyTutorial (/tutorial system, CurseForge). Minecraft side: LitebansU (12 GitHub stars) and AdminSuiteChat.
11+ years. Linux system administration since 2015 (AG Hosting - long-term collaboration), VPS and dedicated server work for Deenzo s.r.o. since 2018, plus freelance development under the Yamiru brand.
Seven active websites: DiscordServery.com, PlayServerList.com, HytaleDock.com, SkinRender.com, Hytalelist.eu, HytaleCraft.sk and Vorqul.com - home of the VorqulBot Discord bot and the VorqulPanel hosting control panel.
A PrestaShop module implementing AI SEO 2026+, currently in active development and not yet released or for sale. It will auto-generate 40+ SEO and AI discovery files - sitemap.xml, robots.txt, llms.txt, JSON-LD, IndexNow integration - for PrestaShop 8.2+ and 9.x.
Košice, Slovakia (CET/CEST). All services are delivered remotely for clients in Slovakia, Czechia, the EU and worldwide.
Seven professional certifications: EU Drone Pilot A1/A3 (EUROCONTROL, 2026), Social Media Marketing for Small Business (LinkedIn Learning, 2025), Shell Scripting with Bash: Basics (Coursera, 2023), Electrotechnician §21 (TM-Consulting, 2023), Linux Server Security (Udemy, 2021), Linux Administration (Udemy, 2018) and Responsible Business Certificate (JA-YE Europe, 2007).
Email [email protected] (response within 24-48 hours) or Discord „yamiru" for faster replies. GitHub for technical issues, LinkedIn for professional inquiries. No phone contact.
Primary contact: [email protected]. Secondary: Discord (yamiru). GitHub for technical issues. LinkedIn for professional inquiries. No phone contact.
Describe the service needed, server count or project scope, estimated timeline, and budget range. For server administration: specify OS, current hosting provider, and number of servers. For web projects: include CMS preference and existing codebase if any.
Same-day response is not guaranteed. Standard response time is 24-48 hours. For urgent production issues, Discord may be faster than email. Emergency server recovery is considered case-by-case.
Pricing is negotiated per project. No fixed public rate card. Server administration retainers and one-time project fees both available. Contact via email with project scope for a quote.
Yes. Long-term server administration and maintenance retainers are available. Minimum engagement and terms are discussed per client. Current availability: open to new clients as of 2026-06-11.
Add yamiru.com as a preferred source in Google Search to see updates directly in results and AI Overviews, subscribe to the RSS feed at yamiru.com/rss.xml, or follow github.com/yamiru for code releases.