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Joanna Ronchi Portfolio

This repository hosts my personal portfolio site, built with HTML and CSS, and deployed using GitHub Pages.

Visit the live site: https://joannar77.github.io


About Me

I am a Data Scientist with a background in IT Management, Accounting, and Analytics.
I focus on turning raw data into clear, actionable insights through reproducible workflows, effective visualization, and rigorous validation.

Currently pursuing a Master’s in Data Science
Core skills: Python • Pandas • NumPy • SQL • MongoDB • Data Visualization • Business & Financial Analytics


Featured Data Analytics Projects

Employee Turnover Data Cleaning

  • Repo: employee-turnover-data-cleaning
  • Highlights: Structured Python workflow for cleaning HR datasets — duplicates, missing values, categorical standardization, derived salary checks, outlier handling, and transparent flagging.
  • Video Walkthrough: Watch on Vimeo

Business Performance Analysis

  • Repo: business-performance-project
  • Highlights: Financial ratio analysis, state-level aggregation, descriptive statistics, debt-to-equity and ROE calculations, and clean visualization workflows in Jupyter Notebook.

HealthFit Data Analysis (MongoDB)

  • Repo: healthfit-mongodb-project
  • Highlights: Actionable health and business insights using MongoDB aggregation pipelines, baseline and optimized queries, and Python + Node.js integrations.

Running Race Registration Demo


Tech Stack

  • Languages & Tools: Python, Pandas, NumPy, SQL, MongoDB, JavaScript, HTML, CSS
  • Visualization: Matplotlib, Seaborn, Data Profiling
  • Deployment: GitHub Pages, Jupyter Notebooks
  • Focus Areas: Data Cleaning • Validation • HR Analytics • Financial Analysis • Outlier Detection • Visualization

Resume

View my resume


Built with HTML, CSS, and GitHub Pages. Last updated: October 2025.


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