About me
I'm Guilherme Belisario de Oliveira, a 25-year-old data engineer born in Brazil with Italian citizenship. My journey began in Chemical Engineering — a foundation that taught me to think systemically and analytically. The transition to data came through an internship and quickly became a passion: the ability to extract intelligence from large volumes of information and transform it into concrete decisions.
With a postgraduate degree in Data Engineering from PUC Minas and experience at companies in the pharmaceutical and financial sectors, I built a multidisciplinary view of the data ecosystem. I work effectively with both technical and business teams, translating business needs into data solutions that work in practice.
Experience
Data Engineer
2025 – PresentTDWBi / Bradesco
Optimization and automation of data pipelines in the credit sector. Ensured quality and efficiency of data flows, created business rules, and produced strategic tables. Implemented modifications to the customer classification engine, improving analytical results in an internal database.
Business Analyst
2023 – 2025Grupo Fagron
Created strategic dashboards and performance reports to support commercial decision-making. Modeled ETL pipelines, defined KPIs with stakeholders, and automated reports to improve business processes.
Tools
Python
Apache Spark
Apache Airflow
Microsoft Azure
Google Cloud
Databricks
SQL
Projects
ETL pipeline that integrates data from multiple formats (XLSX, DOCX, PDF) into Azure Data Lake Storage — automating ingestion, eliminating manual processes, and serving as a foundation for BI and strategic analysis.