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vxx2207/README.md

Velat Isik

Business Informatics student building reliable data products, automation, and decision-ready dashboards. I work across the full path from data collection and validation to analysis, reporting, and interactive presentation.

I am currently looking for a working-student role from November 2026 in data and business intelligence, digitalization, automation, business analysis, or IT project environments.

Featured projects

Reproducible Python and SQL data platform for economic transformation signals in Ingolstadt and Region 10. It combines source ingestion, immutable raw data, quality gates, lineage, analytical marts, exports, reports, and a bilingual dashboard. The project includes 207 automated tests and a multi-platform CI pipeline.

Live documentation and dashboard

Local-first TypeScript learning app with 75 structured lessons, 4,500 flashcards, adaptive spaced repetition, skill-specific practice, and an independent NT2 Programma I training mode. Quality and security checks run automatically on GitHub.

Open the live app

Open-data mobility analytics with a DuckDB star schema, rolling-origin demand forecasting, documented data quality, and an interactive dashboard.

End-to-end market-entry analysis from structured data preparation to an Excel and Power BI dashboard, written report, and final business recommendation.

Configurable Java application that cleans, validates, scores, and segments B2B lead data using transparent business rules.

Life OS — private project

Local-first Electron/PWA for personal planning and journaling with encrypted local storage, backup and restore, offline operation, and automated security, interaction, persistence, accessibility, and visual checks. The source remains private by design; an anonymized demonstration can be provided on request.

Technical toolkit

  • Data and analytics: Python, SQL, SQLite, DuckDB, Excel, Power BI, Tableau
  • Software and web: Java, JavaScript, HTML, CSS, Electron
  • Engineering: Git, GitHub Actions, pytest, Ruff, mypy, MkDocs, CI/CD, data-quality checks and reproducible pipelines
  • Business: DACH market and competitor research, requirements analysis, structured reporting and decision support

More work

Native German speaker with EU work authorization and experience translating business questions into structured, verifiable technical solutions.

Contact

Upwork

Public portfolio projects use sample, synthetic, fixture, or open data and label the respective data class clearly.

Popular repositories Loading

  1. vxx2207.github.io vxx2207.github.io Public

    HTML

  2. dach-market-entry-case-study dach-market-entry-case-study Public

    End-to-end DACH market-entry analysis: Java pipeline → Excel/Power BI → live dashboard → strategy report.

    Java

  3. lead-intelligence-engine lead-intelligence-engine Public

    Configurable, rule-driven Java engine that cleans, enriches, scores and segments B2B leads.

    Java

  4. dach-ecommerce-portfolio dach-ecommerce-portfolio Public

    Three DACH e-commerce sample projects: Java data cleaner, market research (Excel + Power BI), lead research list.

    Python

  5. vxx2207 vxx2207 Public

  6. ingolstadt-mobility-intelligence ingolstadt-mobility-intelligence Public

    Open-data mobility analytics for Ingolstadt: DuckDB star schema, demand forecasting with rolling-origin CV, and an interactive dashboard.

    Python