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Alejandro Castaño
Work

Case studies and things I built. Marketing systems, analytics, automation.

AI-driven marketing automation
012023 — · Design & build

AI-driven marketing automation

End-to-end automation for lead handling and reporting: server-side Meta CAPI events with deduplication, n8n workflows, Google Apps Script back-ends, and a custom MCP server. Removes manual work and improves data quality — with output validated against the source.

  • n8n
  • Meta CAPI
  • Apps Script
  • MCP
  • Server-side
Trustworthy GA4 measurement
032023 — · Analytics engineering

Trustworthy GA4 measurement

GA4 + GTM with server-side tracking and Meta CAPI to fix attribution and data quality across e-commerce brands. Dashboards in Looker Studio so decisions run on numbers people can trust.

  • GA4
  • GTM Server-side
  • Meta CAPI
  • Looker Studio
Shopify store builds & CRO
042022 — · Store build & CRO

Shopify store builds & CRO

Structure, product pages and collections, on-page SEO and conversion optimization for e-commerce stores on Shopify — from taxonomy and feeds to page experience.

  • Shopify
  • CRO
  • On-page SEO
  • Merchant Center
A job-search pipeline for myself
052026· Personal build

A job-search pipeline for myself

To run my own Berlin job search like a data problem: a Python pipeline that pulls roles from official job APIs, filters by visa sponsorship, English and salary threshold, and a ToS-safe MCP that audits my LinkedIn profile against the target market.

  • Python
  • APIs
  • MCP
  • Automation

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