Alejandro Castaño Duque

Technical SEO & GEO Strategist

Technical SEO and GEO for e-commerce, based in Berlin.

Download CV (PDF)CV for ATS portals (PDF, no photo)LinkedIn

Residence permit for job search after graduation in Germany (Section 20 AufenthG): full work authorization, no visa sponsorship needed.

Experience

Sleeplay

SEO & Content Marketing Specialist

Feb 2024 to present

Remote · US e-commerce (CPAP equipment)

Organic CTR +24%, average position from ~17 to ~10 and clicks +9% in six months (Search Console).
AI-visibility monitoring in Peec AI across Google AI Overviews, ChatGPT and Perplexity. Orders from AI assistants +40% year over year (GA4).
Technical SEO roadmap set with engineering: crawl and index control for pagination and faceted navigation, Organization markup and image previews, each change validated in production. AI crawlers unblocked in Cloudflare, verified by bot IP.
Merchant Center conversational attributes for AI Mode and Gemini, and a competitive-intelligence system on 6 stores covering pricing, content and business moves.
Content strategy for the blog and product pages, researched against primary sources; about 3x the publishing cadence in 2026.

Loona Marketing

Co-Founder & Marketing Lead

Jan 2023 to present

Remote · Berlin / Medellín

Surtilight (Shopify): organic clicks x3 and CTR +84% in six months; sessions from AI assistants from 64 to 535 (GA4).
SEO and GEO measurement stack across 5 brands: Search Console archive, Google-update watcher, causal-impact tooling, AI-crawler verification.
Claude skills, agents and MCP connectors for six client accounts, connected to GA4, Search Console, Ahrefs, SEMrush and Shopify.
Lead automation in Google Apps Script with no manual data entry; Shopify builds, CRO and GA4 + GTM server-side tracking.

Webcreativa

SEO Analyst, then SEO Specialist leading the SEO area

Apr 2022 to Feb 2024

Medellín · Google Partner agency

Promoted to lead the SEO area within the first year: strategy, delivery and reporting for 15+ accounts.
Technical audits, on-page SEO, keyword research and content briefs, coordinated with design and development.

Education

Apr 2025 to Jul 2026

Gisma University of Applied Sciences

MSc Business Management & Marketing · Berlin

2015 to 2021

Universidad de Medellín

BSc International Business (marketing emphasis), full scholarship

Certifications

Jul 2026

Google AI Essentials

Google

Introduction to AI · Discover the Art of Prompting · Maximize Productivity With AI Tools · Use AI Responsibly · Stay Ahead of the AI Curve

Credential ID: SER3QEURBCJ0

Dec 2025

Artificial Intelligence for SEO

Platzi

Mar 2026

Strategic Marketing: Segmentation, Targeting, Positioning

The University of Law via FutureLearn

Mar 2026

Digital Marketing: New Trends and Technologies

Nottingham Trent University via FutureLearn

Mar 2026

Marketing in the New Digital Era

Salford Business School via FutureLearn

Mar 2026

Create a Social Media Marketing Campaign

University of Leeds via FutureLearn

Skills

SEO & GEO

Technical SEO
GEO / AI search
Peec AI
Structured data
Core Web Vitals
Search Console
Ahrefs
SEMrush
Screaming Frog

Analytics & tracking

GA4
Looker Studio
Google Tag Manager
Server-side tracking
Microsoft Clarity

AI & automation

Claude
Claude Code
MCP
Google Apps Script
Python (AI-assisted)
n8n (learning)

E-commerce

Shopify
Merchant Center
WordPress
CRO
Cloudflare

Languages

SpanishNative
EnglishB2 (CEFR)
GermanA1 (CEFR), learning