Олена

Olena Didula
Junior Data Analyst

[open contact info](look above in the "contact info" section)
LinkedIn: [open contact info](look above in the "contact info" section) Email:[open contact info](look above in the "contact info" section) | Telegram: @Olena108 | Odesa, Ukraine

SUMMARY
Aspiring Data Analyst with background in accounting. Experienced in the humanitarian sector (aid distribution), where I was responsible
for data collection, conducting surveys, and beneficiary records management. Proficient in inventory accounting, financial reporting, and
documentation management. My technical stack includes Excel, DBeaver, SQL, Power BI, Looker Studio, Google Sheets, Tableau, and
Python. I am passionate about building dashboards and transforming raw data into actionable business insights.

SKILLS
Technical Tools: Data Analysis & Databases: SQL (PostgreSQL, MySQL, MS SQL, BigQuery), Python, DBeaver, Data Cleaning &
Validation, Statistics.
BI & Data Visualization: Tableau, Power BI, Looker, Business Dashboards development, Data Storytelling.
Office & Analysis Tools: MS Excel (Pivot Tables, Complex Formulas, Power Query), Google Sheets.
Business Analytics: Key Performance Indicators (KPIs), A/B Testing, Business Metrics (Conversion, ARPU, LTV, Retention, Churn).
Soft Skills: Accuracy, goal-oriented, responsible, detail-oriented, problem-solving, effective communication, and results presentation.

PROJECT EXPERIENCE
Retention Rate Analysis |April 2026
https://docs.google.com/spreadsheets/d/1JVx8a3i19EYi7pQ42-_H2kznas3xa2rhdQ0zcabrMQ0/edit?gid=319084495#gid=319084495
«User Retention Rate evaluation using Google Sheets and SQL methods based on cohort analysis.»
Tools: SQL, Google Sheets
Description: User Retention Rate evaluation using Google Sheets and SQL methods based on cohort analysis.
Tasks: Performed data cleaning and transformation; prepared complex datasets for cohort analysis; calculated user retention rates and
identified churn points.
Result: Successfully calculated time-to-churn and visualized key retention metrics, enabling the identification of critical churn drivers and
optimization of retention strategies.

Academic Performance & Time Intelligence Dashboard| June 2026
https://drive.google.com/file/d/1Lm9Aa7DfgSAhKeT971-HBWPRooZ-bMwk/view?usp=sharing
Tools: Power BI, DAX, Data Modeling
Description: Developed an end-to-end analytical solution for tracking and evaluating academic performance based on over 1,100 records.
My Tasks:Designed interactive dashboards to visualize average grades across subjects, classes, and time periods.Implemented advanced
Time Intelligence DAX measures to calculate Month-over-Month (MoM) and Year-to-Date (YTD) metrics.Conducted root-cause analysis on
negative grade distribution to identify learning gaps by assignment type.
Result:Successfully created a high-level performance overview providing stakeholders with instant access to academic KPIs (9.16 average
grade).Enabled data-driven decision-making through automated reporting, replacing manual data aggregation.Visualized performance
volatility, allowing for timely identification of negative trends in specific academic segments

VOLUNTEER EXPERIENCE
Humanitarian Aid Coordinator | May 2022 – July 2023
Implemented a structured data validation system, which improved database accuracy.
Optimized document workflows, reducing information retrieval time by 30%.
Developed and conducted surveys; managed beneficiary records and generated periodic reports.
Ensured the integrity and updates of internal databases.

WORK EXPERIENCE
Accountant (1st Category) JSC Ukrposhta, Odesa Directorate | Nov 2008 – Dec 2013 (5 years 2 months)
Analyzed and reconciled large volumes of financial data with high precision.
Managed accurate accounting, consolidation, and analysis of inventory movement.
Conducted regular audits and reconciled warehouse balances with accounting records, successfully identifying and resolving reporting
discrepancies.
Advanced usage of MS Excel for data processing, calculations, and analytical registers.

EDUCATION & CERTIFICATIONS
Data Analyst | GoIT | Feb 2026 – Aug 2026
Bachelor’s Degree in Enterprise Economics | O.S. Popov Odesa National Academy of Telecommunications | 2010 – 2013
Junior Specialist in Accounting | Automobile and Road College, ONPU | 2004 – 2007

LANGUAGES
Ukrainian: Native
Russian: Native
English: Elementary
Romanian: Elementary