Wiesław Tkacz, Data Analyst and Strategist
Snapshot
I have worked in marketing for over ten years. I work with every marketing platform that needs tracking plugged in, which in practice means all the ones a client has. Day to day: GTM, GA4, Google Sheets, BigQuery, Power BI, Tableau, Google Ads, Meta Ads, TikTok Ads, Elevar, Northbeam, Triple Whale and more.
What I do
Dashboards, reports and visualisations of every kind. Tracking for websites and apps, built from scratch. Server-side setups. And every connection between platforms, whether to pull data out of them or to pass it from one to another.
GTM and CDP systems
What it means for you: Your tracking is properly understood, audited and fixed.
Spreadsheets and reporting tools
What it means for you: Even the most advanced reports and dashboards, built to fit you.
Data analysis
What it means for you: The right queries, asked of the data you have collected.
When I use which tool
GTM
In most cases. Tracking is organised and managed in one place, without bringing in developers every time.
GA4
In most cases, to measure overall customer behaviour.
Server-side
When we want to make measurement tighter and get more control over the data and its quality.
BigQuery
When we want to collect and analyse the data more flexibly, without limits.
Who calls me
Industries
FAQ

What does a data analyst do in a marketing team?
I build the tracking, connect the platforms, and turn the data into dashboards and reports the team can make decisions on.
When is server-side tracking worth it?
When you want tighter measurement, and more control over your data and its quality.
Do we need developers every time tracking changes?
Not in most cases. With GTM, tracking is managed in one place without bringing developers in each time.
Next step.
Bring the report you do not quite believe. Book a call with Wiesław.