08/26/2026 updated
100 % available
Data Analyst | SQL, Python, Tableau & BI Dashboards
Poland
Worldwide
MSc Advanced Marketing & ManagementAbout me
Need reporting you can trust? I define KPIs, replace manual reporting with scalable dashboards, and turn customer and product data into clear decisions. I bring 5 years of relevant analytics experience, including work at Uber, Amazon and Apple, with advanced SQL, Tableau and QuickSight.
A/B TestingData AnalysisAudience SegmentationBusiness IntelligenceCustomer AnalyticsData QualityData VisualizationForecastingPython (Programming Language)SQL DatabasesStakeholder ManagementSalesforce TableaupandasKpi Reporting
DATA ANALYSIS & SQL
Advanced SQL for data extraction, transformation, validation and analysis, including joins, CTEs, window functions, aggregations and reusable reporting datasets. Experienced in investigating performance trends, data-quality issues and operational drivers.
BUSINESS INTELLIGENCE & DASHBOARDS
End-to-end dashboard delivery using Tableau and Amazon QuickSight: requirements gathering, KPI definition, dataset design, dashboard development, validation and stakeholder adoption. Experienced in replacing manual reports with scalable, self-service BI reporting.
CUSTOMER, PRODUCT & OPERATIONAL ANALYTICS
Customer segmentation, customer-experience analysis, product and marketplace performance, funnel and behavioural analysis, forecasting, A/B testing and trend analysis. Skilled in converting ambiguous business questions into measurable KPIs and practical recommendations.
TOOLS
SQL (advanced), Tableau, Amazon QuickSight, Excel, Python for data analysis, Pandas and NumPy.
PROFESSIONAL EXPERIENCE
Five years of relevant analytics experience, including work at Uber, Amazon and Apple. At Uber, I support Uber for Business as its sole Data Analyst, developing SQL datasets, KPI dashboards and executive customer-experience reporting. At Amazon, I built automated QuickSight reporting and standardised KPI datasets for product and operational teams. At Apple, I analysed LLM evaluation data, quality metrics and behavioural trends.
PROJECTS I CAN SUPPORT
SQL analysis and reporting datasets
KPI definition and dashboard development
Tableau and QuickSight dashboards
Customer, product, marketplace and operational analytics
Segmentation, forecasting and A/B-test analysis
Reporting automation and data-quality validation
Executive reporting and data storytelling
I combine hands-on analysis with commercial judgement, clear communication and experience working independently with product, operations, engineering and senior leadership.
Experience
Professional experience0 - 5 years
Freelancer since2026
Languages
GermanBasic knowledgeEnglishFluentGreekNative speakerSpanishGood
Project history
Serving as the sole Data Analyst supporting Uber for Business, partnering with commercial and operational stakeholders to structure ambiguous business questions and deliver decision-ready insights. Leading end-to-end development of a KPI dashboard for voucher products, developing executive reporting to identify customers experiencing poor service, and translating stakeholder requirements into scalable SQL-based datasets and clear data visualisations.
Designed and implemented automated BI solutions in QuickSight, reducing manual reporting effort and enabling scalable self-service insights. Analysed system-level data to identify logic issues and optimisation opportunities within tax workflows. Partnered cross-functionally to define KPIs and centralise reporting, and developed interactive dashboards and data visualisations to uncover marketplace usage trends and deliver data-driven recommendations.
Analysed evaluation data from LLM-generated responses using internal quality metrics and structured frameworks, identifying behavioural trends and edge-case failure patterns. Applied SQL to analyse evaluation data and share insights with team leads. Led initiatives focused on team development and innovation as Growth & Development Champion and Innovation Champion.