Nikolina Dzenzelevska-Data Scientist & Data Analyst
Check rate
Experience
Data Scientist
Genesis
- Designed, trained, and evaluated predictive machine learning models to optimize digital product metrics, lifetime value, and user acquisition funnels.
- Conducted comprehensive exploratory data analysis (EDA), advanced feature engineering, and data cleaning using Python, pandas, and scikit-learn.
- Collaborated with engineering teams to deploy and integrate machine learning algorithms into high-load production environments.
- Improved model validation frameworks and performance pipelines, achieving higher prediction accuracy for complex user behavior analysis.
Data Analytics Research Intern
State University of Trade and Economics (SUTE) — Research & Innovation Lab
- Assisted university faculty and researchers in gathering, cleaning, and structuring large datasets for applied economic and market analytics studies.
- Utilized R and Python to perform statistical modeling, regression testing, and data visualization for academic reports.
- Automated data extraction workflows, reducing manual processing time for research lab publications by 25%.
Data Analyst
Kyivstar
- Extracted, cleaned, and processed large-scale telecommunication datasets using advanced SQL and Python to support strategic business decisions.
- Developed dynamic interactive dashboards and analytical reports in Tableau and Excel to track core performance indicators (KPIs) and churn metrics.
- Performed statistical analysis and customer segmentation to identify growth opportunities, improving service delivery and operational reporting efficiency.
- Worked closely with cross-functional teams to define data requirements and optimize enterprise reporting structures.
Data Labeler / Annotation Specialist
Label Your Data
- Performed precise image and video data labeling tasks to support computer vision machine learning model training and dataset development.
- Ensured high accuracy, consistency, and compliance in annotating complex datasets according to rigorous client guidelines.
- Collaborated closely with annotation teams and computer vision engineers to maintain high data quality standards and meet tight project deadlines.
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Telecommunication, and Education.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Business Intelligence, Quality Assurance, Marketing, Product Development, and Strategy.
Summary
Results-driven Data Scientist, Analyst, and Data Labeler with a robust background in system analytics, machine learning model optimization, and big data processing. Proven track record of working with leading Ukrainian technology enterprises (Genesis, Kyivstar, Label Your Data), combining rigorous data engineering with practical computer vision and business analytics insights. Dedicated to precision, automated workflows, and high-impact analytics.
Skills
Programming & Db:
Python
Sql
R
Pandas
Numpy
Scikit-Learn
Analytics & Tools:
Tableau
Excel (Advanced)
Data Visualization
Data Annotation
Statistical Analysis
Languages
Education
State University of Trade and Economics (SUTE)
Bachelor of Science · System Analytics / Data Analytics · Kyiv, Ukraine
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Nikolina is based in Kyiv, Ukraine.
Nikolina speaks the following languages: Russian (Native), Ukrainian (Native), English (Intermediate).
Nikolina has at least 4 years of experience. During this time, Nikolina has worked in at least 4 different roles and for 4 different companies. The average length of individual experience is 1 year and 11 months. Note that Nikolina may not have shared all experience and actually has more experience.
Based on recent experience, Nikolina would be well-suited for roles such as: Data Scientist, Data Analytics Research Intern, Data Analyst.
Nikolina's most recent position is Data Scientist at Genesis.
In recent years, Nikolina has worked for Genesis, State University of Trade and Economics (SUTE) — Research & Innovation Lab, Kyivstar, and Label Your Data.
Nikolina is most experienced in industries like Information Technology, Telecommunication, and Education.
Nikolina is most experienced in business areas like Information Technology, Business Intelligence, and Quality Assurance. Nikolina also has some experience in Marketing, Product Development, and Strategy.
Nikolina holds a Bachelor in System Analytics / Data Analytics from State University of Trade and Economics (SUTE).
The availability of Nikolina needs to be confirmed.
Daily rate distribution
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Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 25 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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