MLADENOVIC.AT
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systems engineer · devops · infrastructure

Dejan
Mladenović

I build, automate, and secure infrastructure.
From bare-metal clusters to cloud platforms —
I make complex systems work reliably.

Systems Engineer · DevOps · Vienna 🇦🇹
$ cat expertise.yaml
infra: Proxmox · Linux · Docker
cloud: Azure · GCP · M365 · Intune
power: Power BI · Apps · Automate
auto: Airflow · Python · Bash
monitor: Zabbix · Centreon · Grafana
itsm: Jira · JSM · ServiceWare
analytics GA4 · GTM · GDPR
sec: AD · OAuth2 · RBAC · PAM
web: WordPress · Elementor · CMS
$ uptime
building things that matter.
$

capabilities

full stack · systems

INFRASTRUCTURE
Virtualisation & Linux
Proxmox VELXC / KVMDebianUbuntuFedoraDockerNFSsystemd
CLOUD & M365
Azure · GCP · M365 · Intune
Azure MonitorAMA / ArcIntune MDMM365 AdminSharePointExchange/EWSGCP ConsoleMaps API
POWER PLATFORM
Power BI · Apps · Automate
Power BIPower AppsPower AutomateDataverseFlow Automation
AUTOMATION
Pipelines & Workflows
Apache Airflow 3PythonBashREST APIsEWSSharePoint API
MONITORING & OPS
Zabbix · Centreon · Grafana
ZabbixCentreonGrafanaPrometheusUptime KumaAzure Monitor
SECURITY & IAM
Zero-Trust · AD · PAM
Active DirectoryOAuth2LDAPKerberosRBACAutheliaVauntra
ITSM & PLATFORMS
Jira · JSM · Confluence
Jira SoftwareJSM AdminConfluenceJira AutomationServiceWareDrupal
WEB & CMS
WordPress · Elementor
WordPressElementorBlock ThemesCustom CSS/JSHTML/CSSSEO
ANALYTICS & GDPR
Tracking · Tag Manager · DSGVO Compliance
Google Analytics 4Google Tag ManagerConsent Mode v2Cookie BannerCookiebotBorlabs CookieGDPR / DSGVOConversion Tracking
NETWORKING
Zero-Trust · Reverse Proxy · DNS
TraefikTailscaleCloudflare TunnelAdGuard DNSWireGuardVPNCloudflared
DEVELOPMENT
Go · React · Python · Electron
GoPythonReact / Next.jsPostgreSQLMinIO / S3Apache GuacamoleElectronREST API DesignGit

proficiency

experience depth

Linux & Virtualisation
93%
Jira / JSM Administration
90%
Networking / Zero-Trust
86%
Python & Automation
84%
WordPress / Elementor
82%
Azure / M365 / Intune
80%
GA4 / GTM / GDPR
79%
Monitoring (Zabbix/Centreon)
78%
Security / IAM / AD
77%
Power BI / Apps / Automate
74%
GCP / Maps / Cloud APIs
68%
Go / React / Dev
61%

open source · production · personal

selected projects

PAM · PASSWORD MANAGER · OPEN SOURCE
Self-hosted PAM + password manager platform. SSH/RDP proxy with session recording, credential vault, AD/LDAP sync, RBAC, REST API. AGPLv3 + Enterprise SaaS tier.
GoReactPostgreSQLGuacamoleMinIO
HOMELAB · CLUSTER · 20+ SERVICES
3-Node Proxmox Cluster
Production homelab on Futro S540 thin clients. Full monitoring, media stack, Nextcloud AIO, zero-trust networking. Tailscale + Cloudflare Tunnel + Authelia SSO.
ProxmoxDockerTailscaleTraefikAuthelia
AUTOMATION · PYTHON · PRODUCTION AIRFLOW
Enterprise IT Automation
Production Airflow 3 DAGs: EWS contact sync, CardComplete processing, PKC/BOE worklog reporting to SharePoint. OAuth2, Exchange SOAP, Power Platform integration.
Airflow 3PythonEWSSharePoint API
ITSM · REPORTING · JIRA
JSM Helpdesk Analyse
Analysis of 10,000+ tickets across 3 years. Identified hidden 4th workflow lane (24% of volume), 7 improvement proposals, KPI reporting framework for 440+ users.
Jira JSMData AnalysisPower BIProcess Optimization
ANALYTICS · GDPR · WEB COMPLIANCE
GDPR-Compliant Tracking Stack
End-to-end Analytics setup for production sites: GA4 via Tag Manager, Consent Mode v2, Cookie Banner integration, GCP Maps API quota management, fully DSGVO-konform.
GA4GTMCookiebotGCP ConsoleMaps API
SECURITY · ACTIVE DIRECTORY
Kerberoasting Remediation
Full triage of AD service accounts authenticating via RC4. SPN analysis, remediation roadmap, secret rotation workflow, Azure syslog forwarder setup for SIEM.
Active DirectoryKerberosAzure ArcSIEM
DESKTOP · ELECTRON · LINUX
WebApp Builder
Electron tool generating isolated .desktop web apps for GNOME/Fedora. SSO domain whitelisting (80+ domains), ad blocking, custom CSS/JS injection, per-app sessions.
ElectronJavaScriptLinuxGNOME
WEB · WORDPRESS · ELEMENTOR
Full custom Elementor kit for Bmove — EV parking app. Three design variants (light/dark/neutral), glassmorphism nav, bento grid, matrix loader, responsive mobile-first.
WordPressElementorCustom CSS/JSResponsive

about

how I work

BASED IN
Vienna · Austria
DOMAIN
Systems · DevOps · Infra
FOCUS
Automation · Reliability
LANGUAGES
DE · EN · SR
I run a 3-node Proxmox cluster, build PAM platforms in Go, and ship production Airflow pipelines.
By day: enterprise Microsoft stack — Azure, Intune, M365, Power Platform, Jira/JSM administration.
Web: full-stack delivery from WordPress builds to GA4 + GTM tracking with full GDPR compliance.
Off-hours: open-source builds — Vauntra, custom Linux tooling, infrastructure-as-code at home.
Philosophy: automate what hurts, monitor what matters, document what others will maintain.

get in touch

contact

LOCATIONVienna, Austria 🇦🇹
© 2026 Dejan Mladenović systems engineer · vienna v3.0