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Continuously learning
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Continuously learning
  • Germany

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Sergei890/README.md

Hi, I’m Sergei 👋

Data Analyst / BI Analyst focused on Python automation, ETL, data quality, and BI reporting.

I build practical data solutions that connect data analysis, business understanding, automation, and reporting. I work on practical data workflows: cleaning, validating, transforming, and preparing data for analysis, dashboards, reporting, and structured outputs.

Data Analytics GIF

Tech stack

Python SQL Power BI Excel ETL Data Quality Git

Focus areas

  • Data cleaning and validation
  • Python-based workflow automation
  • ETL and API-based data extraction
  • SQL analysis and structured data exploration
  • Power BI dataset preparation and reporting logic
  • Excel-to-Python process automation
  • Data-quality checks and reusable reporting outputs

Tools and methods

  • Programming: Python, pandas, NumPy
  • Databases & queries: SQL
  • BI & reporting: Power BI, Power Query, DAX, Excel
  • Automation: openpyxl, REST APIs, ETL workflows
  • Applications: Flask basics, Git
  • Data work: cleaning, validation, transformation, fuzzy matching, structured outputs

Repositories

This GitHub is used for selected technical examples, portfolio projects, and sanitized/synthetic-data demos related to data analysis, automation, ETL, and BI workflows.

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