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cjulianr92-afk/README.md

Hi, I'm Cristian 👋

Data Analyst | SQL | Python | Tableau

I am a Data Analyst with a background in Electronic Engineering and hands-on experience working with business-focused data projects.

My work includes data cleaning, exploratory analysis, SQL querying, statistical analysis, A/B testing, dashboard development, and translating analytical results into actionable insights.

I recently completed a Data Analytics bootcamp and I am currently looking for opportunities where I can continue developing as a Data Analyst.

🛠️ Skills

Languages & Analysis

  • Python
  • SQL
  • Pandas
  • NumPy
  • SciPy

Databases

  • PostgreSQL

Visualization

  • Tableau
  • Matplotlib

Analytics

  • Statistical Analysis
  • A/B Testing
  • Business Analytics
  • Data Visualization

Tools

  • Git
  • GitHub

📊 Featured Work

📞 CallMeMaybe — Operator Efficiency Analysis

Analyzed call-center operator performance and identified high-priority cases using operational metrics, statistical analysis, and Tableau.

🧪 Recommender System A/B Test

Evaluated whether a new recommendation system improved user conversion through funnel analysis and statistical hypothesis testing.

📚 Book Market SQL Analysis

Used PostgreSQL queries to explore publishing trends, ratings, reviews, authors, and user activity.

🌐 Portfolio

👉 Visit my Data Analytics Portfolio

📫 Let's Connect

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  1. cjulianr92-afk.github.io cjulianr92-afk.github.io Public

    HTML

  2. CallMeMaybe-Operator-Efficiency-Analysis CallMeMaybe-Operator-Efficiency-Analysis Public

    Data analysis project to identify potentially inefficient call-center operators using Python, statistical testing, and Tableau.

    Jupyter Notebook

  3. Recommender-AB-Test-Analysis Recommender-AB-Test-Analysis Public

    A/B test analysis evaluating the impact of a new recommendation system on user conversion, including experiment validation, funnel analysis, and statistical hypothesis testing.

    Jupyter Notebook

  4. Book-Market-SQL-Analysis Book-Market-SQL-Analysis Public

    SQL analysis of a PostgreSQL book database to identify publishing trends, highly rated authors, active users, and business insights.

    Jupyter Notebook

  5. vehicle_market_analysis_dashboard vehicle_market_analysis_dashboard Public

    Interactive dashboard built with Python, Streamlit and Plotly for exploring used vehicle market data in the United States.

    Jupyter Notebook

  6. chicago_taxi_weather_analysis chicago_taxi_weather_analysis Public

    SQL and Python analysis of Chicago taxi trips to evalue the impact of weather conditions on trips duration.

    Jupyter Notebook