Hi there👋

I’m Mayo Racek

>Data Analyst & Engineer designing trustworthy data solutions.

I help turn fragmented tracking and raw event data into reliable, governed data products that people, businesses and AI systems can actually use.

My work covers the complete data journey: measurement architecture, first-party collection, BigQuery modelling, data quality, activation, monitoring and conversational analytics.

This website is where I document the systems I build, the problems I solve and the lessons learned along the way.

Explore my projects Read the blog

Selected projects </>

First-Party Analytics Pipeline
BUILDING IN PUBLIC

A governed first-party analytics system covering anonymous identity, event collection, Server GTM, BigQuery modelling, traffic-source attribution and future AI-assisted insights.

Analytics Engineering Server GTM BigQuery

Polaris FC Universe
FOOTBALL DATA

A constraint-valid football data universe designed for analytics engineering, player development, governed decision support and future football intelligence agents.

Football Analytics Data Engineering AI Agents

GTM Operations Agent
FLAGSHIP BUILD

An ADK multi-agent system that connects to the Google Tag Manager API to audit containers, detect duplication and race-condition risks, propose safe improvements, execute approved changes and report conversationally on GTM governance.