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Hanna LewkowiczHL

Hanna Lewkowicz

Data Analyst

€250/day
Zurich, CH
0-2 years

Average response time: 1 hour

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 Analyst
    October 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
    Python Pandas API Alteryx automation
  • Rrrefs,
    Data Analyst
    November 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
    Microsoft Excel Python Pandas Data analysis API
  • Utest
    Freelance 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
    User Testing

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Education

  • Master in Management and
    WSB University
    2021
    Master in Management and
  • Beschelor in International Business
    University of Economics
    2018
    Beschelor in International Business

Skill set

Categories