Nataliia

NATALIIA BONDARENKO
Junior Data Analyst
Junior Data Analyst with practical experience in analysing e-commerce
data (55,000+ transactions), data preparation, and visualisation using
SQL, Python, and Tableau. Experience in developing dashboards,
conducting statistical analyses, and building initial machine learning
models. Focus on data-driven optimisation of business processes and
user behaviour.
[відкрити контакти](див. вище в блоці «контактна інформація»)​ LinkedIn
[відкрити контакти](див. вище в блоці «контактна інформація»)​ GitHub

EDUCATION
•​ Further Training: Data Analysis – Deutsche Tech Akademie (DTA), Germany.
•​ Bachelor's Degree: Accounting and Audit – Zaporizhzhia National University, Ukraine.

TECHNICAL SKILLS
•​ Languages & Tools: SQL (BigQuery), Python (Pandas, NumPy).
•​ Dashboards, Reports & Visualisation: Tableau, Power BI.
•​ Analysis: Excel (Pivot Tables, Data Analysis), Data Pipelines (ETL/ELT), Basic Statistics.
•​ Machine Learning: Applied ML models (OLS Regression, Random Forest)
in practical projects.
•​ AI: Basic knowledge of Generative AI / LLMs.
•​ UX/UI: User behaviour analysis and conversion optimisation.

PROJECTS
E-Commerce Revenue & Customer Behaviour Analysis → https://nataliib.github.io/Ecommerce-Analytics-DTA/
•​ Analysed 55,000 e-commerce transactions using SQL (BigQuery) and
developed interactive Tableau dashboards to identify revenue trends and
seasonality.
•​ Conducted statistical analysis (OLS Regression) to examine the relationship
between customer age and order value.
•​ Developed a Random Forest model to identify key revenue drivers.
UK-500 Data Cleaning & Analysis Pipeline → https://github.com/NataliiB/task-ETL-1
•​ Cleaned and standardised a UK-500 contact dataset using Python (Pandas),
including normalisation of emails, websites, and phone numbers to ensure consistent
data quality.
•​ Performed feature engineering, data filtering, and aggregations to
analyse geographic distribution and email domains.
•​ Identified key patterns such as the most frequent cities and dominant email providers.
•​ Produced structured outputs (CSV / Excel reports) for further use in reporting
and analysis processes.

WORK EXPERIENCE
Data Analysis Training (with Practical Projects) – DTA, Germany | 10/2025 – 03/2026
•​ Analysed real-world datasets using SQL and Python to derive data-driven insights.
•​ Created dashboards and reports using Tableau and Power BI.
•​ Performed data cleaning and transformation.
Online Internship as Media Designer – HollyAff Advertising Agency, Ukraine | 04/2024 – 09/2024
•​ Optimised workflows and production processes in online marketing, resulting in a
40% increase in output.
•​ Analysed user behaviour to identify optimisation potential along the customer journey.
•​ Built and optimised web pages (HTML, CSS) to improve user experience.
•​ Fixed minor JavaScript bugs to ensure technical functionality.
Language Integration Programme – Germany | 03/2023 – 08/2025
•​ Developed German language skills to B2 level (certified) through an intensive
language course and integration programme in Germany.
Self-Study in Web Development | 02/2022 – 02/2023
•​ Independently built foundational skills in JavaScript, HTML, and CSS.
•​ Developed an understanding of web structures and user interactions.
•​ Applied knowledge through small projects to consolidate technical and analytical abilities.
Administrator – Bifort Distribution Company, Ukraine | 11/2019 – 02/2022
•​ Managed and maintained data in an ERP system (invoices, delivery notes).
•​ Coordinated and optimised operational business processes to increase efficiency.
•​ Supported data-driven optimisation of sales processes, contributing to a doubling
of sales figures.
•​ Trained staff in the use of the ERP system to ensure data quality and stable workflows.

SOFT SKILLS
•​ Analytical thinking and structured approach to work.
•​ Independence and sense of responsibility.
•​ High willingness to learn and quick comprehension.
•​ Teamwork and clear communication.

LANGUAGES
•​ German: B2 (Certified) – good written and spoken skills; currently advancing to C1.
•​ English: B1 – good foundational knowledge; currently advancing to B2.
•​ Russian: Fluent.
•​ Ukrainian: Native language.