Олена

DIDULA OLENA

Junior Data Analyst 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
CONTACTS business insights.
[відкрити контакти](див. вище в блоці «контактна інформація»)
[відкрити контакти](див. вище в блоці «контактна інформація»)
Telegram: @Olena108
LinkedIn: PROJECT EXPERIENCE
[відкрити контакти](див. вище в блоці «контактна інформація»)
olena-559907412/ Academic Performance & Time Intelligence Dashboard
Odesa, Ukraine | June 2026

Tools: Power BI, DAX, Data Modeling
Description: Developed an end-to-end analytical solution for
PROFESSIONAL COMPETENCIES tracking and evaluating academic performance based on over
1,100 records.
• Writing medium-complexity My Tasks:
queries, extracting data from Designed interactive dashboards to visualize average grades
relational databases across subjects, classes, and time periods.
• Working with pivot tables, Implemented advanced Time Intelligence DAX measures to
complex formulas, and Power calculate Month-over-Month (MoM) and Year-to-Date (YTD)
Query metrics.
• Designing, developing, and Conducted root-cause analysis on negative grade distribution
maintaining interactive business to identify learning gaps by assignment type.
dashboards Result:
• Solid understanding of key Successfully created a high-level performance overview
performance indicators (KPIs) providing stakeholders with instant access to academic KPIs
• A/B Testing (9.16 average grade).
• Business Metrics: Conversion, Enabled data-driven decision-making through automated
ARPU, LTV, Retention, Churn reporting, replacing manual data aggregation.
Visualized performance volatility, allowing for timely
• Statistics
identification of negative trends in specific academic
• Data Visualization & Data
segments
Storytelling
• Data Cleaning & Validation Retention Rate Analysis | April 2026

Tools: SQL, Google Sheets
TECHNICAL TOOLS
Description: User Retention Rate evaluation using Google
Sheets and SQL methods based on cohort analysis.
• SQL: PostgreSQL, MySQL, MS
Tasks: Performed data cleaning and transformation;
SQL, BigQuery
prepared complex datasets for cohort analysis; calculated
• BI & Data: Tableau, Power BI,
user retention rates and identified churn points.
Looker
Result: Successfully calculated time-to-churn and visualized
• Office & Analysis: MS Excel,
key retention metrics, enabling the identification of critical
Google Sheets
churn drivers and optimization of retention strategies.
• Development: Python,
DBeaver
SOFT SKILLS WORK EXPERIENCE

• Accuracy, Humanitarian Aid Coordinator (Volunteer) | May 2022 –
• goal-oriented, July 2023
• responsible,
• detail-oriented, Implemented a structured data validation system, which
• problem-solving, improved database accuracy.
• effective communication, Optimized document workflows, reducing information retrieval
• results presentation. time by 30%.
Developed and conducted surveys; managed beneficiary
LANGUAGES records and generated periodic reports.
Ensured the integrity and updates of internal databases.
• Ukrainian: Native
• Russian: Native JSC Ukrposhta, Odesa Directorate
• English: Elementary Accountant (1st Category) | Nov 2008 – Dec 2013
• Romanian: Elementary
Analyzed and reconciled large volumes of financial data with
high precision.
EDUCATION
Managed accurate accounting, consolidation, and analysis of
• GoIT: Data Analyst | Feb 2026 inventory movement.
– Aug 2026
• Ministry of Education and Conducted regular audits and reconciled warehouse balances
Research: Romanian with accounting records, successfully identifying and
Language Course (Level A1) | resolving reporting discrepancies.
2025
• O.S. Popov Odesa National Advanced usage of MS Excel for data processing,
Academy of calculations, and analytical registers.
Telecommunications:
Bachelor’s Degree in Enterprise
Economics | 2010 – 2013
• Automobile and Road
College, ONPU: Junior
Specialist in Accounting | 2004
– 2007