Hello, welcome to my
Data Analysis and Data Science Portfolio.
On this page, I showcase my ability to solve business problems using Data Science concepts and tools through projects based on public datasets.
I also describe my professional experience, skills, tools, and concepts related to Data Analysis and Data Science. Please feel free to get in touch using the contact information at the end of the page.
My name is Renata de Araújo E. Silva
I'm a Data Analyst with experience working in fully remote, international environments, where clarity, autonomy, and structured communication are essential.
Over the past 3 years, I have helped transform raw data into actionable insights that support strategic business decisions.
My work spans the full data lifecycle — from data extraction, cleaning, and transformation (ETL) to building scalable data models, performing exploratory and
statistical analysis, and developing executive dashboards. I focus on writing reliable, reproducible code and creating analytics solutions that are clear, documented, and decision-oriented.
Having collaborated across distributed teams, I value asynchronous communication, ownership, and proactive problem-solving.
I am particularly motivated by environments where data drives product, operations, and growth decisions at a global scale.
I see my role as a bridge between data and strategy — translating complexity into clarity and enabling teams to move forward with confidence.
Programming Language
- Python focused on data analysis (Pandas, Numpy, Seaborn, Matplotlib).
Statistics and Machine Learning
- Predictive modeling, statistical analysis, and model evaluation.
Data Curator (Remote Freelance)
Lausanne Business Solutions · United States | Nov 2024 – Present
Worked on Artificial Intelligence projects focused on data curation,
linguistic quality, and Large Language Model (LLM) training support,
ensuring semantic accuracy, native fluency, and data reliability.
Expertise in dataset curation and validation, Portuguese ↔ English
translation review, application of Prompt Engineering techniques, and
automation of data workflows via APIs, SQL, and Python, resulting in
significant gains in quality and operational efficiency.
Experience with annotation, thematic classification, continuous auditing
of textual corpora, and data governance practices to support
data-driven decision-making.
Data Analyst (Remote Freelance)
Dash Smart Decisions · Brazil | Dec 2022 – Aug 2024
Worked as a Data Analyst focused on business intelligence, automation
of analytical processes, and generation of strategic insights.
Expertise in automating ETL pipelines with SQL and Python and developing
interactive dashboards in Power BI, supporting managerial decisions
through KPIs and data-driven analysis in multidisciplinary contexts.
Data Analysis and Data Science Projects
Development of a Management Dashboard with Streamlit
In this project, I used Python and Streamlit to develop an interactive dashboard featuring key metrics for a real estate buying and selling company.
The tools used were:
- Python, Streamlit, Github, VS Code.
Health Insurance Cost Prediction
Application of Data Science to investigate the impact of smoking on insurance costs, using regression models to estimate medical expenses.
The tools used were:
- Python, Scikit-Learn, Descriptive Statistics.
Fintech Data Insights
Transactional data analysis to identify behavioral patterns and bottlenecks, combining SQL processing with clear data visualization.
The tools used were:
- Python, SQL, Google BigQuery.
Autism Spectrum Disorder Prediction
Development of a Machine Learning model to support the identification
of Autism Spectrum Disorder (ASD) indicators based on clinical and behavioral data.
The project includes exploratory analysis, data preprocessing, and evaluation of predictive models.
The tools used were:
- Python, Pandas, Scikit-Learn, Statistics.
Feel free to get in touch.