About Hanna
I help turn messy data into clean, structured insights you can actually use.
Data Analyst with experience in banking and real-world data projects. I specialize in:
•data cleaning & preprocessing
•building dashboards
•improving data quality
•automating reporting processes
Currently working with Python, SQL, Power BI, and Databricks.
I’ve worked with complex, inconsistent datasets and know how to turn them into reliable, analysis-ready data.
Polish
Native or bilingual
English
Fluent
German
Basic
Remote only
Primarily works remotely
Experience
- UBS,Data AnalystOctober 2023 - Today (2 years and 8 months)Zürich, Switzerland• · Delivered end-to-end data analytics solutions - from business requirements to dashboards used by senior stakeholders• · Built and automated reporting pipelines (Python, SQL, Excel), reducing manual work and reporting time• · Developed interactive dashboards (Power BI) supporting data-driven decision-making• · Applied statistical analysis to identify trends, anomalies, and business insights across large datasets• · Designed and implemented data validation frameworks, improving data accuracy and consistency• · Collaborated with cross-functional teams (risk, business, IT) to translate data into actionable insights
- Rrrefs,Data AnalystNovember 2025 - Today (7 months)Zurich, Switzerland• · Designed a standardized data collection system for field researchers operating across multiple locations• · Transformed highly inconsistent Excel datasets into structured, analysis-ready formats• · Built validation mechanisms (Excel + VBA) to ensure data completeness and quality• · Defined scalable data architecture for integrating field data with external API (MERMAID platform)• · Developed data cleaning and transformation workflows using Python (pandas)• · Created a framework for merging observational data with biodiversity datasets (marine ecosystem tracking)• · Proposed and designed ETL pipeline for periodic data ingestion and processing• · Improved data usability for analysis and reporting, enabling future dashboarding and insights
- UtestFreelance Tester (uTest Platform)December 2022 - Today (3 years and 6 months)• · Performed manual testing of web and mobile applications across multiple devices• · Identified and reported bugs with detailed documentation• · Ensured usability and UX consistency across platforms
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Education
- Master in Management andWSB University2021Master in Management and
- Beschelor in International BusinessUniversity of Economics2018Beschelor in International Business