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Iwona Gratkowska

Analyst

Wirtualna Polska Group / Warsaw School of Computer Science | Warsaw, Poland

Technologies

My Portfolio Highlights

My New Project

Investigating Netflix Movies

My New Workbook

Project: Visualizing the History of Nobel Prize Winners

My New Project

Investigating Netflix Movies

Data Science Enthusiast | Python & SQL Specialist Passionate About Big Data Insights

My Work

Take a look at my latest work.

project

Exploring NYC Public School Test Result Scores

Python
project

Investigating Netflix Movies

DataLab

Project: Visualizing the History of Nobel Prize Winners

DataLab

Project: Exploring Airbnb Market Trends

DataLab

Project: Predictive Modeling for Agriculture

DataLab

Project: Hypothesis Testing with Men's and Women's Soccer Matches

DataLab

Project: Customer Analytics: Preparing Data for Modeling

project

Exploring NYC Public School Test Result Scores

Python

DataCamp Course Completion

Take a look at all the courses I’ve completed on DataCamp.

Courses

Introduction to Python
Intermediate Python
Supervised Learning with scikit-learn
Data Manipulation with pandas

My Work Experience

Where I've interned and worked during my career.

Wirtualna Polska Group | Feb 2025 - Present

Junior System Sales Analyst

I turn data into action: designing and analyzing A/B tests, building interactive Power BI dashboards, and writing SQL and Python solutions to streamline processes. I connect business strategy with analytics and technical execution, constantly exploring creative ways to boost revenue and drive measurable impact. My work consistently identifies growth opportunities and informs decisions that increase company revenue.
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Gemius SA | Dec 2022 - Feb 2025

Internet Technology Specialist

As an Internet Technology Specialist, I analyzed client advertising data, created detailed reports, and identified trends to optimize campaign performance. I developed Python scripts and SQL queries to automate tasks, process large datasets, and streamline workflows. I solved complex technical problems, provided second-line support, and improved tools and processes to boost efficiency across teams. Promoted from Junior Specialist in April 2024, I took on greater responsibility for data-driven decision-making and campaign optimization.

My Education

Take a look at my formal education

Bachelor of Engineering in Computer Science, specialization in Data ScienceWarsaw School of Computer Science | 2026
Technician in Computer ScienceHigh School of Communications | 2022

About Me

Aspiring data scientist with a background in computer science and experience in data analysis, Python, and SQL. Passionate about harnessing big data to uncover trends and enhance decision-making.

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