Infrastructure Linux (Ubuntu, Unraid), Docker, Nginx, SSL, Let's Encrypt
Networking Bind9 DNS, RPZ, SSH, firewall, multi-subdomain routing
AI / ML Ops Ollama, Claude, agent orchestration, prompt engineering
Automation n8n, webhooks, cron, data pipelines, self-healing flows
Databases PostgreSQL schema design, queries, ETL, backups
IoT / Smart Home Home Assistant, Raspberry Pi, DHT22, GPIO
Programming Python, JavaScript, HTML/CSS, REST APIs, Git
Troubleshooting 20+ years — telecom, manufacturing, software, hardware