Mission impossible — Online

EvgenyGorun

20+ years in IT, 10+ years as a systems administrator. Windows Server, Linux, Active Directory, virtualization (VMware/Hyper-V/Proxmox), MikroTik/Cisco networking, Zabbix monitoring, automation. 1000+ completed IT projects.

📄 Resume: Systems Administrator 📄 Cover Letter: Systems Administrator Portfolio → Get in Touch →

20+

Years in IT

10+

Years as a Sysadmin

1000+

Completed IT Projects

30+

IT Conferences

NODE 01 · — About Me

About

✉️johngorn@yandex.ru

@johngorn0

🌐johngorn.com

IT Architect and Systems Administrator with over 20 years of experience

I specialize in designing, deploying, and maintaining IT infrastructure of any complexity, helping businesses build reliable, secure, and scalable systems. Beyond infrastructure, I work as a web developer: I build websites — including custom themes and modules — and independently design and maintain Linux-based server infrastructure, ensuring the security, performance, and fault tolerance of web projects.

I combine technical expertise with a business-minded approach to deliver real results and drive company growth.

Windows ServerLinuxWeb DevelopmentProxmox VEVMware / Hyper-VMikroTikActive DirectoryZabbixGrafanaPowerShellDockerSQL / MySQLBitrix24

NODE 02 · Competencies

Competency Map

20+ years of hands-on experience — from networking and servers to virtualization, monitoring, automation, and security. Select an area to explore the details.

Networking

MikroTik / RouterOSExpert

Routing / VLANExpert

WireGuard / VPNAdvanced

Firewall / NATAdvanced

Wi-Fi / Access PointsAdvanced

CiscoProficient

Servers

Windows ServerExpert

Active DirectoryExpert

Linux (Ubuntu / Debian)Expert

DNS / DHCPExpert

Nginx / ApacheAdvanced

Email (Postfix / Exchange)Advanced

Virtualization

Proxmox VEExpert

VMware vSphereAdvanced

Hyper-VAdvanced

Docker / ContainersAdvanced

Clustering / HAAdvanced

Monitoring

ZabbixExpert

GrafanaAdvanced

Alerting / TelegramAdvanced

LoggingAdvanced

PrometheusProficient

Automation

PowerShellExpert

BashAdvanced

Telegram BotsAdvanced

SQL / ReportingAdvanced

AnsibleProficient

Security

Backup (Veeam)Expert

Fault Tolerance / FailoverExpert

SSL / CertificatesAdvanced

Access ControlAdvanced

Auditing / HardeningAdvanced

Web Development

WordPress (Themes + Plugins)Expert

PHPAdvanced

HTML5 / CSS3Advanced

Responsive DesignAdvanced

JavaScriptAdvanced

MySQLAdvanced

NODE 03 · Portfolio

Featured Projects

Completed projects and achievements from years of practice.

Infrastructure

🖥️ Systems Administration

Servers, virtualization (VMware/Hyper-V/Proxmox), Active Directory, networking, IP telephony, and corporate services. Zabbix monitoring, information security and data protection, backup.

Automation

⚙️ Process Automation

Building reporting modules and automating business processes: system integration, data processing and exports, scheduled runs with notifications. PowerShell, Python, Bash, SQL, VBA, REST API.

Networking

🖧 Enterprise Network Lab (MikroTik)

MikroTik hEX S (RB760iGS) and CRS326-24G-2S+RM managed switch. 802.1Q VLANs with inter-VLAN routing, OSPF dynamic routing, least-privilege firewall/NAT, WireGuard VPN, and CHR virtual routers on Proxmox.

Monitoring

📊 Two Monitoring Stacks — Zabbix and Prometheus

Built two monitoring systems for a real fleet (cloud server + home Proxmox hypervisor + virtual machines): Zabbix 7.0 with a custom Vue/Nuxt dashboard, and Prometheus + Grafana. Both with public demos and internal-infrastructure masking. WireGuard, BFF architecture, Let's Encrypt. Zabbix dashboard → · Grafana →

Web Development

🌐 johngorn.ru — portfolio

This site: a custom WordPress theme built from scratch — markup, PHP/MySQL, responsive design, and deployment on a self-managed Linux server.

Video Surveillance

📹 Video surveillance — full cycle

Full cycle: from a self-hosted equipment online store to on-site installation and configuration. Store built on Medusa + Next.js — catalog, faceted filters, YooKassa payments, self-hosted deployment. Plus turnkey design and installation: IP/analog, recorders, networking and PoE, remote access. Hikvision, Dahua. Open store →

MESSENGER

💬 Self-Hosted Messenger — Matrix with Calls

A federated self-hosted messenger on the Matrix protocol: Synapse and PostgreSQL in a Proxmox LXC container, published through nginx with Let's Encrypt on a cloud edge node and a WireGuard tunnel to the home server. End-to-end encryption, invite-only registration, federation with other Matrix servers. One-on-one calls and group video conferences via the MatrixRTC stack: LiveKit SFU, coturn (TURN) and JWT authorization. Nightly backups with restore testing, monitored by Zabbix and Grafana. Open →

Telegram Bots

🤖 Telegram Bots

Four production bots in Python (aiogram 3): a system alert bot (backups, Zabbix, Grafana), a public info bot with a Telegram Mini App, an online-store bot, and a SaaS notification bot. Telegram API access from Russia via a custom proxy layer; alert delivery over SSH with forced-command.

SAAS

📈 uptime — Website Monitoring as a Service

My first SaaS: users sign in via Telegram, add their own sites and get availability, SSL and speed checks every 5 minutes with Telegram alerts. Under the hood — a multi-tenant architecture (Nuxt 3 + PostgreSQL in an LXC container), a probe worker in the cloud, public status pages with an uptime badge, a dashboard with incident history. SSRF protection, rate-limiting, CI/CD and backups with restore testing. Open →

IaC

🏗️ Infrastructure as Code

9 idempotent Ansible roles with CI. A heterogeneous Proxmox fleet (containers and virtual machines) and two monitoring stacks are described as code: provisioning, configuration, monitoring, alerting, SSH hardening, and backups are reproducible from the repository, checked in CI (ansible-lint), and version-controlled. Repeat runs make zero changes; a service is restored from its role in seconds; production changes go through preview and rollback.

NODE 04 · home lab

My Home Lab

A lab where I test new technologies and solutions before deploying them in production. Hover over a node to see what it does.

🌐InternetExternal uplink and public static IP

🛡️MikroTikNetwork layer of the lab. MikroTik hEX S (RB760iGS) router + CRS326-24G-2S+RM managed switch on RouterOS: 802.1Q VLAN segmentation and inter-VLAN routing, OSPF dynamic routing, least-privilege firewall/NAT, WireGuard VPN, topology practice on CHR virtual routers.

🖥️Proxmox VEHypervisor: virtual machines and containers, fault tolerance, backups

🪟Windows Server 2022Active Directory, domain services, GPO

🐧Ubuntu ServerLinux services, web servers, scripts

🐳DockerService containerization, fast deployment

📈ZabbixServer and network monitoring, alerts

📊GrafanaDashboards and metrics visualization

🔐WireGuardSecure VPN access to the lab

🗄️MySQLDatabases, replication

☁️NextcloudCloud storage and collaboration

NODE 05 · live telemetry

Infrastructure Status

This site runs on fault-tolerant infrastructure I designed and maintain myself: a primary server in the cloud and a hot standby in my home lab — with database replication and automatic failover.

All systems operational

syncing…

Primary nodeCloud · —● operational

Backup nodeHome lab · Edge · —● operational

Database replicationEncrypted tunnel · auto-failover● active

Open status panel →

NODE 06 · automation