Hey! I'm Joana da Matta, a Computer Science student from Brazil. I'm currently in my last year of undegrad. I have a passion for Machine Learning, Artificial Intelligence and Linguistics. Let's connect!

<aside> 📍 Rio de Janeiro, Brazil ✉️ [email protected] 🔗 LinkedIn 👩‍💻 Github ✍️ Notion Homepage

LANGUAGES
→ Portuguese (Native) → English (Fluent) → French (Fluent)

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EDUCATION HISTORY

Bachelor in Computer Science @ ****PUC-Rio, Brazil

[Aug 2021 - Jul 2026]

Bachelor in Informatics @ Université de Montréal, Canada

[Jan 2024 - Dec 2024]

→ Undergraduate exchange program

OTHER EXPERIENCE

Cohere Labs ML Understanding Co-Lead

[May 2026 - Present]

→ Serve as a Community Lead and researcher in Cohere Labs’ ML Understanding Open Research Group

→ Foster community engagement through technical discussions, organizing and leading collaborative research projects, organizing guest speakers and supporting knowledge-sharing activities.

Aya Expedition 2026

[February 2026 -

Climate Change AI Summer School

[June 2024 - August 2024]

→ Lectures and hands-on practice on topics relating to both Climate Change and AI.

TEPP Scholarship (13.500 USD)

[May 2022 - July 2023]

→ Scholarship for students with excellent academic performance in STEM courses at PUC-Rio.

WORK EXPERIENCE

Decision Support Intern @ Tecgraf

[July 2025 - present]

→ Contributing to the development of an AI and data-driven Decision Support System for supply chain analysis in the Well Supply domain at South America's largest oil and gas company.

→ Skills:

• Linear programming, optimization, ML in python, Langchain, Azure AI Search, OpenAI Models.

Undergraduate Researcher @ NOIS PUC-Rio

[Sep 2024 - Aug 2026] (2 years)

→ Working under professor Igor Peres at the Center for Healthcare Research and Operations at PUC-Rio.

→ Published an R package for ICU length of stay prediction and evaluation using machine learning, and a dashboard for on-the-go analysis.

→ Skills:

• Synthetic data generation, ensemble model training in R and Python, Amazon AWS, Jupyter notebooks.

Data Engineer Intern @ Visagio

[Aug 2023 - Dec 2023] (5 months)

→ Automated critical indicators for analytics and optimized the ETL process between the Data Lake and Unity Catalog for enhanced stability.

→ Skills:

• Microsoft Azure (Databricks, DevOps, Data Factory, Logic Apps etc.), Apache Spark (PySpark), Git, SQL.

RELEVANT COURSES

→ Supervised Machine Learning: Regression and Classification by DeepLearning.AI and Stanford

→ Neural Networks and Deep Learning by DeepLearning.AI and Stanford

→ Attention in Transformers by DeepLearning.AI