Piotr Rybak

Data and Analytics

Berlin, Berlin, Germany

About

I have over 15 years of diversified experience in data analytics, quantitative research and consulting for the biggest players in Europe. I have developed tools for sales forecasting and data analysis. In the last three years I concentrated on building my expertise in data science and machine learning.

Experience

  • Senior Business Intelligence Analyst at kfzteile24 GmbH
    Aug 2025 - Apr 2026 · 9 mos

    Improved decision‑making by delivering modern, insight‑driven dashboards (BI, data visualization). Built scalable analytical frameworks and automated reports to increase efficiency (data modeling, automation). Translated business needs into actionable data products (stakeholder collaboration, requirements analysis). Enhanced data consistency through KPI standards and clear documentation (data governance). Elevated data quality to support strategic and commercial initiatives (data quality management).

  • Data Analyst at Neugelb Studios GmbH
    Oct 2021 - Apr 2025 · 3 yrs 7 mos

    Analysis of users behaviour in the Mobile Banking App. Overseeing data processing pipelines in DBT. Development of Tableau dashboards and collaboration with stakeholders. Supervising tracking requirements.

  • Data Scientist at COMP Centrum Innowacji Sp. z o.o.
    Apr 2020 - Sep 2021 · 1 yr 6 mos

    Building supervised and unsupervised machine learning models in the domain of FMCG data warehouse Pricing optimization and conducting sales analytics Maintenance and development of client focused Power BI reports Conducting R&D analyses and developing methodologies to offer to external stakeholders Delivering analyses directly to the clients

  • Data Scientist at Cisco
    Jun 2018 - Feb 2020 · 1 yr 9 mos

    Designing and preparing analysis leveraging SQL, Python and Tableau. Building predictive machine learning models with an aim of business optimization. Big Data wrangling and automatizing data processing in Python.

  • Nielsen (9 yrs 10 mos)
    • Associate Manager
      Mar 2011 - Jun 2018 · 7 yrs 4 mos

      Building and maintaining ongoing business partner relationships with the client. Providing the client with consultancy on their planned innovations, marketing, and positioning strategies for new product launches (Personal Care, Homecare, Durables, Tobacco, OTC, Confectionary). Consumer and in-market data analysis, reports preparation, sales forecasting. Coordinating of and/or data analysis for Nielsen Breakthrough Innovation Report 2015/16.

    • Research Analyst / Senior Research Analyst
      Sep 2008 - Feb 2011 · 2 yrs 6 mos

      Consumer and in-market data analysis, reports preparation, sales forecasting.