TAJA.
Analytics Engineer & Data Engineer
I build data models, pipelines, and BI layers that turn messy operational data into systems people actually trust.
Warsaw, Poland
01 / About
About Me
Analytics Engineer with 3+ years building data models, pipelines, and BI layers. Currently transitioning into Data Engineering — working with Snowflake, dbt, PySpark, and Airflow. I care about clean data, scalable systems, and making complex things simple.
Skills
Languages
- PolishNative
- RussianNative
- EnglishFluent
- FrenchIntermediate
02 / Experience
Experience
Nov 2025 — Present
Analytics Engineer
Just Join IT
- —Designed reusable analytical data models in Snowflake using dbt
- —Built semantic data models and standardized business metrics across Sales, Product, Marketing, CS
- —Developed SQL transformations from raw operational data to analysis-ready datasets
- —Integrated CRM (Pipedrive), product analytics and internal data sources
- —Improved legacy analytics queries and reporting structures
Apr 2024 — Nov 2025
Business Data Analyst
Just Join IT
- —Built Power BI dashboards for marketing, sales and operational reporting
- —Developed early dbt models in Snowflake
- —Cohort analysis, funnel tracking, performance analysis
- —Defined consistent business metrics across teams
Jul 2022 — Mar 2024
Response Rate Specialist
Just Join IT
- —Designed Twitter engagement strategy: +20% response rate, +35% engagement
- —Built performance dashboards in Google Sheets
- —Campaign data analysis and user engagement metrics
Education
In progress, exp. Aug 2026
Data Engineer Course
Infoshare Academy
In progress, exp. 2027
Management, Master's
SWPS University Warsaw
2020 — 2023
Management & Leadership, Bachelor's
SWPS University Warsaw
03 / Projects
Projects
Squash Performance Analytics
End-to-end analytics pipeline built with DuckDB, SQL and Python. Layered data models (staging, marts) feed a win probability prediction model based on historical performance, recent form, and match metrics. Orchestrated with Make for a modular SQL + Python workflow.
Cheese Analytics Pipeline
Web scraping pipeline using requests and BeautifulSoup, with data cleaning and feature engineering feeding a similarity scoring model for product recommendations. Modular Python scripts orchestrated via Make.
04 / Contact
Let's Talk
Open to opportunities in analytics and data engineering. Reach out directly or find me on the usual places.
hiiii.taja@gmail.com