Data Analyst - OnePortal @ T-Mobile Polska

Proficient in SQL, with experience querying large datasets and optimizing performance Skilled in data visualization tools (e.g., Tableau, Power BI, Metabase) Experience in Python or R for analysis and automation is a plus Strong understanding of product funnels, user journeys, and cohort analysis Familiarity with A/B testing methods and statistical evaluation Solid business acumen — you know how to turn numbers into actionable decisions Clear and confident communicator — able to present finding…