Яна

YANA PISKOVA
Junior Data Analyst
[open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section) Telegram: @Yan4uk1807
LinkedIn: [open contact info](look above in the "contact info" section) Cherkasy, Ukraine

SUMMARY
Detail-oriented Junior Data Analyst skilled in SQL, Python (Pandas, NumPy), Excel, and Power
BI. Experienced in data visualization, A/B testing, and exploratory data analysis, delivering
insights on marketing performance and user behavior to identify key drivers of engagement
and conversion. Strong analytical thinking, teamwork, and time management, featuring self-
discipline, trustworthiness, and a passion for learning.

HARD SKILLS
SQL
Python
Data Cleaning & Transformation
Exploratory Data Analysis (EDA)
A/B Testing and Statistical Analysis
Data Visualization & Reporting

TOOLS
Tableau Amplitude PostgreSQL, MySQL Pandas, NumPy, Matplotlib
Power BI Looker Studio Excel and Google Sheets Jupyter Notebook
PROJECT EXPERIENCE
Project 1: Analysis of Delivery Terms
https://public.tableau.com/app/profile/.68054697/viz/Analysisofdeliveryterms_17605220421890/Analysisofdeliveryterms
Tools: Tableau Public, Data Visualization, Dashboard Design
Description: Developed interactive Tableau dashboard to analyze sales trends, subcategory
profitability, and delivery term efficiency.
My tasks:
Created time series overview of sales/profit to identify key performance patterns.
Explored profitability by subcategory/shipping mode to highlight high-margin segments.
Designed delivery analysis: order count by delivery days and avg. time across U.S. states.
Implemented dynamic filters and map visualizations for user-friendly data exploration.
Result: Identified key performance patterns and high-margin segments, enabling data-driven
sales/delivery optimizations.
Project 2: Playing Time in Battle Pass
https://public.tableau.com/app/profile/.68054697/viz/PlayingtimeinBattlepass/HW_6_PlayingtimeinBattlepass

Tools: Tableau Public, Calculated Fields, Data Visualization, Interactive Dashboard Design
Description: Built interactive Tableau dashboard for mobile game user activity/engagement
analysis via calculated fields and time breakdowns.
My tasks:
Created monthly unique user trends and % engaged in "Battle Pass" activities.
Designed avg. playtime visualizations with custom (HH:MM) calculated fields.
Built heatmap for avg. playtime by age/activity quarter, spotting demographic
engagement gaps.
Added interactive filters: date, age, game, device language for in-depth analysis.
Result: Revealed demographic engagement insights to target game features and boost player
retention.
WORK EXPERIENCE:
Elysium Furniture Factory
Accountant
March 2024 – Present
Payroll accountant.
Primary documentation management.
Production accountant.
Key Achievement: Successfully transitioned to a new production management program.

McDonald's
Administrative assistant
December 2012 – May 2024
Hiring and dismissal of staff.
Contract management and payment of invoices.
Control of cash documentation.
Key Achievement: Organized successful restaurant openings.

EDUCATION:
IT School "GoIT"
June 2025 - Present
Certificate in Data Analysis

Genius.space
September 2023 - November 2024
Accountant course for individual entrepreneurs

Cherkasy State Technological University
September 2006 - June 2011
Master’s Degree in Finance

LANGUAGES:
English – Pre-Intermediate, Ukrainian – Native