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I am a data analyst with 2+ years of experience in data analytics and reporting, supporting marketing and business teams with automated dashboards, SQL-based analysis, and data quality validation. I have a strong background in Python, SQL, Power BI, Tableau, and ETL collaboration, with a proven ability to translate complex data into actionable insights that drive business decisions. Based in Wroclaw, Poland, I am open to relocation and excited to contribute to data-driven teams across industries.…I am a data analyst with 2+ years of experience in data analytics and reporting, supporting marketing and business teams with automated dashboards, SQL-based analysis, and data quality validation. I have a strong background in Python, SQL, Power BI, Tableau, and ETL collaboration, with a proven ability to translate complex data into actionable insights that drive business decisions. Based in Wroclaw, Poland, I am open to relocation and excited to contribute to data-driven teams across industries.

WENJIAO ZHOU

Data Analyst, Data Scientist, AI Developer, +5

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I am a data analyst with 2+ years of experience in data analytics and reporting, supporting marketing and business teams with automated dashboards, SQL-based analysis, and data quality validation. I have a strong background in Python, SQL, Power BI, Tableau, and ETL collaboration, with a proven ability to translate complex data into actionable insights that drive business decisions. Based in Wroclaw, Poland, I am open to relocation and excited to contribute to data-driven teams across industries.…I am a data analyst with 2+ years of experience in data analytics and reporting, supporting marketing and business teams with automated dashboards, SQL-based analysis, and data quality validation. I have a strong background in Python, SQL, Power BI, Tableau, and ETL collaboration, with a proven ability to translate complex data into actionable insights that drive business decisions. Based in Wroclaw, Poland, I am open to relocation and excited to contribute to data-driven teams across industries.

Available to hire

I am a data analyst with 2+ years of experience in data analytics and reporting, supporting marketing and business teams with automated dashboards, SQL-based analysis, and data quality validation. I have a strong background in Python, SQL, Power BI, Tableau, and ETL collaboration, with a proven ability to translate complex data into actionable insights that drive business decisions.

Based in Wroclaw, Poland, I am open to relocation and excited to contribute to data-driven teams across industries.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Polish

Intermediate

Work Experience

Data Analysis Specialist at SHEIN

September 1, 2025 - Present

Designed and automated end-to-end ETL pipelines with Python, MySQL, Trino and Hive to integrate multi-source warehouse and logistics data into a centralized data mart, cutting daily manual processing time by 35% and improving data availability for analysis. Built and maintained 10+ Tableau dashboards for key supply chain KPIs (inventory turnover, order fulfillment, warehouse utilization), reducing weekly reporting time from 2 days to under 4 hours and enabling faster decision-making by operations and management teams. Optimized complex SQL queries across Trino and Hive, improving query performance by 45% and supporting near real-time monitoring for critical warehouse and shipment operations. Analyzed 5M+ transactional records to identify bottlenecks in warehouse and logistics processes, driving a 12% reduction in shipment delays and a 15% improvement in storage space utilization.

Data Analysis Specialist at No.7 Fruit Shop

June 1, 2019 - August 1, 2022

Analyzed sales, customer, and inventory data using Excel, SQL, FineBI, and Python to uncover purchasing trends and optimize stock levels. Built interactive dashboards in FineBI to visualize daily sales performance and inventory turnover, improving decision-making efficiency. Developed data-driven pricing and promotion strategies, increasing customer retention by 50% within one year. Enhanced inventory forecasting accuracy, reducing waste by 70% and ensuring consistent product availability. Supported the expansion of the flagship store from 20m² to 52m², doubling monthly net profit from CNY 20K to CNY 40K through data insights.

Data Science Intern at Microsoft - Poland

January 1, 2023 - June 1, 2023

Developed machine learning models on Microsoft Azure to analyze biometric data from wearables and smartphones, aiming to improve sleep quality monitoring and automation. Processed and cleaned 500K+ biometric records using Python (pandas, NumPy) and SQL, standardizing data formats and selecting key features to enhance model accuracy. Built and fine-tuned deep learning models with TensorFlow and Keras, achieving 92% accuracy in sleep stage classification. Designed a feedback-driven optimization system combining user activity logs and cognitive test data, improving sleep habits for 75% of pilot users.

Data Analysis Specialist at SHEIN – Poland

September 1, 2025 - Present

Designed and automated end-to-end ETL pipelines with Python, MySQL, Trino and Hive to integrate multi-source warehouse and logistics data into a centralized data mart, cutting daily manual processing time by 35% and improving data availability for analysis. Built and maintained 10+ Tableau dashboards for key supply chain KPIs, reducing weekly reporting time from 2 days to under 4 hours. Optimized complex SQL queries across Trino and Hive, improving query performance by 45% and enabling near real-time monitoring of warehouse and shipment operations. Analyzed 5M+ transactional records to identify bottlenecks, driving a 12% reduction in shipment delays and 15% improvement in storage utilization.

Senior Data Analysis Specialist (Supply Chain) at SHEIN — Poland

September 1, 2025 - December 1, 2025

Monitored and analyzed marketing, sales, and logistics data to identify trends affecting campaigns, customer fulfillment, and operational efficiency. Designed and automated ETL pipelines with Python and SQL, integrating multi-source data for real-time reporting, reducing manual processing by 35%. Built and maintained 10+ Tableau dashboards tracking KPIs such as campaign ROI, order fulfillment, inventory turnover, and shipping delays. Optimized SQL queries for ad-hoc marketing analyses and campaign tracking, improving query speed by 45%. Investigated data discrepancies and collaborated with Data Engineers to ensure data accuracy.

Data Analysis Specialist (Retail) at No.7 Fruit Shop — China

June 1, 2020 - August 1, 2022

Collected and analyzed customer behavior, sales, and promotion data to optimize marketing campaigns and inventory. Developed Power BI dashboards to monitor sales performance, campaign effectiveness, and inventory turnover, enabling managers to quickly identify high-performing products and promotions. Designed data-driven pricing and promotion strategies, increasing customer retention. Applied forecasting models to predict demand and reduce inventory waste.