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Dmitrii
@wasilitch
Linux VPS, Docker, Nginx, SSL and server setup expert
Slovakia
Czech, Russian, English, Slovak
About me
I'm Dmitrii, Managing Director of an EU-registered IT infrastructure and security firm in Slovakia since 2016, with 20+ years of hands-on Linux and Windows Server experience. I don't guess. When production breaks, I inspect your live logs first and keep a rollback path ready. I fix real root causes across Docker, Nginx, SSL, SSH/firewall hardening, Cloudflare DNS, SPF/DKIM/DMARC mail delivery, VPS migrations, and Python/PDF automation. Message me with your error first to confirm scope.
Skills
Dmitrii
Offline •
See my services
Server Administration
I will recover fix and harden your linux or windows vps and docker server
Email Management
I will fix cloudflare dns SSL spf dkim dmarc and business email delivery
Work experience
Managing Director & Principal Systems Engineer
Self-Employed / Freelancer • Self-employed
Jan 2016 - Present • 10 yrs 10 mos
Statutory Managing Director and lead infrastructure engineer at PartsOutlet, an independent EU-registered IT systems, defensive security, and B2B server hardware company in Slovakia established in January 2016. Every production change gets verified personally with a rollback plan ready. Core engineering work: 1. Server hardening and defensive security audits across Linux (Ubuntu, Debian, Fedora) and Windows Server hosts: closing exposed ports, SSH and RDP lockdown, WireGuard VPN segmentation, and offline backup isolation. 2. Remote incident response and outage recovery across Docker Compose, Nginx, Traefik, PostgreSQL, SQL Server, DNS, and SSL/TLS layers with written root-cause notes. 3. Business email deliverability and Cloudflare DNS architecture: strict SPF, DKIM signing, DMARC alignment, Google Workspace, and Microsoft 365. 4. Maintainable Python, Bash, and PowerShell automation for REST APIs, health checks, and PDF/CSV data workflows.
