Leon Papadopoulos

Key Expertise & Solutions:

- Advanced Analytics & Tracking: Full-service implementation of Piwik Pro (Consent Management, Event Tracking, Server-Side) and migration from GA4 to ensure data quality and reduce CPA.

- Performance Marketing (SEA): Scaling of Google Ads & Shopping through Smart Bidding, precise attribution management, and technical excellence in GTM.

- Technical SEO & Visibility: Data-driven SEO with a focus on crawling efficiency (Screaming Frog), competitive benchmarks (Sistrix), and Core Web Vitals to maximize organic ROI.

- Data Science Integration: Linking conversion paths with business KPIs to sustainably reduce Customer Acquisition Costs (CAC).

Senior Expert: Marketing Data Science, Technical SEO & Analytics

As a strategic digital marketer and data scientist, I combine 15 years of experience in transforming complex data streams into measurable growth levers. I bridge the gap between data engineering and high-performance marketing.

> Marketing Data-Driven Analytics & Tracking

Specialist in the architecture of clean data sources and data protection-compliant tracking.

Piwik Pro: Full-service implementation, consent management, and migration from GA4. Conception of complex attribution models for direct CPA reduction.

> Technical Setup: Configuration of trigger logic in GTM/Piwik Pro, debugging, and implementation of server-side tracking to bypass ad blockers.

> Performance Marketing (SEA) & Scaling

ROI maximization through data-driven campaign management.

Google Ads Excellence: Scaling of Search & Shopping via Smart Bidding and Quality Score optimization.

LTV Attribution: Linking ad spend with Customer Lifetime Value through advanced analytics.

> Technical SEO & Semantic Authority

Purely technical, data-driven approach for sustainable visibility.

Audits & Performance: Deep-dive audits with Screaming Frog, Core Web Vitals optimization, and indexing management.

Structure & Semantics: Schema.org (JSON-LD), E-E-A-T strategies, and competitive benchmarks via Sistrix.

Conversion Focus: CTR hacking and Local SEO dominance to convert traffic into leads.

> Data Science & Business Intelligence

Utilizing Python and SQL to go beyond standard solutions. Creation of automated dashboards (Looker Studio, Power BI) for full transparency on Customer Acquisition Costs (CAC).