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Jennifer Evangelista

Data Architecture & Data Engineering Specialist | Databricks Certified Data Engineer Professional | AWS & Google Cloud certified.

The 275th professional from Brazil to join the official Databricks Certified Directory in the Data Engineer Professional category.

I build reproducible data pipelines and practical AI applications with Python, SQL and PySpark, with a strong focus on cloud modernization, FinOps and governance.

Harvard CS50 course certificates (2026): Introduction to Artificial Intelligence with Python · Introduction to Databases with SQL.

Credentials and badges: Credly.

LinkedIn · Medium · DEV · All links


Featured projects

Project What you'll find
Data Engineering Lab Reproducible Python, SQL and PySpark examples for data quality, CDC, join cardinality and freshness. Synthetic data, tests and GitHub Actions.
Night Guard An open-source applied AI MVP/prototype in development, designed to help children understand concerning chat messages and ask for help. Local analysis with Gemma, practice scenarios and configurable family rules. Read the project story on DEV.
CS50 AI Learning Portfolio Concepts and results from the 12 projects in Harvard's CS50 AI course. Solutions remain private in line with the course policy.

What I work on

  • Data architecture & engineering: data contracts, SQL, PySpark, CDC and repeatable pipelines.
  • Data quality: reconciliation, duplicate detection, join cardinality and freshness checks.
  • Applied AI: open-weight models, local inference and model fine-tuning.
  • Engineering practice: small runnable examples, synthetic fixtures, tests and documented limitations.

Selected writing

More articles

Connect

For data architecture, data engineering and applied AI collaborations: LinkedIn.

Explore more on Medium, DEV, Databricks Community, Kaggle, Hugging Face and Zindi.

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  1. cs50-ai-learning-portfolio cs50-ai-learning-portfolio Public

    CS50 AI portfolio: 12 projects, concepts and results.

  2. data-engineering-lab data-engineering-lab Public

    Reproducible Python, SQL and PySpark labs for data quality and CDC.

    Python

  3. night-guard night-guard Public

    Helps kids understand what happened in an online chat and choose how to ask for help. Runs locally with Gemma.

    Python