Cristian Rodriguez

Cristian Julian Rodriguez Valbuena

Data Analyst | SQL, Python, Tableau

I enjoy turning complex data into clear insights that support better business decisions. My background in Electronic Engineering strengthens my analytical thinking, problem-solving, and ability to work with technical information.

About Me

I am a Data Analyst with hands-on experience using SQL, Python, Pandas, Tableau, PostgreSQL, and statistical analysis through business-focused projects. My work includes operational performance analysis, A/B testing, conversion analysis, database querying, dashboard development, and hypothesis testing.

Technical Skills

Python SQL Pandas NumPy SciPy PostgreSQL Tableau Matplotlib Statistical Analysis A/B Testing Data Visualization Git GitHub

Selected Projects

CallMeMaybe — Operator Efficiency Analysis

CallMeMaybe Operator Performance Dashboard
Python | Pandas | SciPy | Tableau | Statistical Analysis

Analyzed telecom operator performance to identify inefficient operators using call activity, missed calls, and response-time metrics.

  • Analyzed 1,133 operators.
  • Identified 41 high-priority cases.
  • Created an interactive Tableau dashboard.
GitHub Repository →

View Tableau Dashboard →

Recommender System A/B Test Analysis

Conversion Rates by Test Group
Python | Pandas | SciPy | A/B Testing | Statistical Analysis

Evaluated whether a new recommendation system improved user conversion across the product funnel.

  • Validated the experimental design.
  • Analyzed conversion across key funnel stages.
  • Applied two-proportion z-tests.
View Project →

Book Market SQL Analysis

Book Market SQL Analysis Results
SQL | PostgreSQL | Python | Pandas | SQLAlchemy

Analyzed a relational database containing books, authors, publishers, ratings, and customer reviews.

  • Built queries using JOINs and subqueries.
  • Used GROUP BY, HAVING, and aggregate functions.
  • Identified publishing and user engagement patterns.
View Project →

Contact

I am currently exploring opportunities in Data Analytics, Business Intelligence, and Product Analytics.