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Alejandro Castaño
Work

Systems I built: marketing automation, technical SEO and GEO, tracking.

The AI operating layer for client accounts
012023 to today· Design and build

The AI operating layer for client accounts

Claude skills, agents and MCP connectors adapted per client, plus n8n workflows and Google Apps Script, connected to Search Console, GA4, Ahrefs, SEMrush, DataForSEO, Screaming Frog and Shopify. Expert playbooks (audits, content, product pages, reporting) run in hours instead of days. One client store: organic clicks x3 and CTR +84% in six months.

  • Claude
  • MCP
  • n8n
  • Apps Script
Tracking you can trust, leads with zero manual entry
032023 to today· Tracking & automation

Tracking you can trust, leads with zero manual entry

GA4 + GTM server-side + Meta Conversions API with event_id deduplication: lead events arrive browser + server with Event Match Quality 9+/10. Lead handling automated end to end with Google Apps Script and n8n (validation, anti-spam, CAPI, Sheets and CRM). Deploys cut from 30 minutes to seconds with a CLI I built.

  • GA4
  • GTM server-side
  • Meta CAPI
  • n8n
A job-search pipeline and a LinkedIn audit MCP
042026· Personal build

A job-search pipeline and a LinkedIn audit MCP

To run my own Berlin job search like a data problem: a pipeline on official job APIs that filters roles by language, visa sponsorship and salary threshold, and a ToS-safe MCP server that audits a LinkedIn profile against the keyword demand of real job titles. No scraping, no account access.

  • Job APIs
  • MCP
  • Automation

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