Hi, I'm Leo!

Download My Resume (PDF)
Experience

Data Science Intern

Ismart

  • Built Machine Learning models (Regressions, Random Forest and XGBoost) to recommend the top 30 high potential schools on a map for outreach, identifying statistically significant drivers from census and admissions data
  • Developed interactive Streamlit dashboards with 25+ visualizations to help educators monitor KPIs, engagement, and social indicators for a tech-focused program, supporting micro and macro level decision-making
  • Created an ETL pipeline for academic performance and engagement data, applying scripting skills with the Google Sheets API and Pandas (Python), preparing it for analysis and storage in Azure SQL Database
  • Designed a snowflake-schema data model within a scalable architecture to integrate multi-platform and organizational student records, optimizing storage via normalized dimensions and integer encoding
Python
Machine Learning
ETL
Figma
Automation
Streamlit
Data Visualization
Google API
Data Analysis

Data and Software Development Intern

LyfeOS

  • Developed an internal web system with JavaScript and DynamoDB (AWS) to automate app content updates
  • Conducted user interviews and tests to address pain points, collaborating with Content and Design teams
  • Automated 3 data entry processes with Python (PyAutoGUI)
  • Designed UML diagrams and prototypes using Figma
  • Documented 25+ tables of data lake bronze layer and 10+ app events for data analysis on Amplitude
JavaScript
DynamoDB(AWS)
Python
Figma
Automation
User research
Problem-solving
Startup
Product

Computer Science Grader

Grinnell College

  • Graded C programming assignments for a class of 20+ students, providing detailed feedback on coding standards and clean code practices
  • Collaborated with faculty in weekly meetings to refine grading methods and ensure alignment on C language concepts and evaluation criteria
  • Provided constructive, code-specific feedback on syntax, logic, and structure, while upholding confidentiality and maintaining impartial grading practices
C language
Code Review
Academic Integrity
Clean Code Practices
Attention to Detail
Debugging

Technical Assistant | Information Technology Services

Grinnell College

  • Resolved support tickets, providing phone and in-person technical assistance
  • Maintained student database records, ensuring data accuracy
  • Managed account resets, logins, and multifactor authentication for security compliance
Database management
Communication
Troubleshooting
Attention to Detail
Customer Service

Trainee Manager and Alumni Relations Coach

Latin American Leadership Academy

  • Planned and executed course logistics
  • Led daily feedback meetings with the team
  • Mentored 5 students individually
  • 150+ impacted students
  • Coordinated daily meetings focused on improving interpersonal relationships
Communication
Leadership
Task division
Mentoring
Community building
Projects

GOALS! - Habit Tracker

Description: Track your progress and visualize the impact of consistent small steps toward your goals

  • Designed REST APIs to perform CRUD of goals and contributions
  • Implemented gamification strategies such as contribution points and crowns for better usability
  • Created intuitive interactions with React and Tailwind CSS for Front-end
React
JavaScript
MongoDB
NodeJS
HTML
Tailwind CSS
Github
VS Code

Panpedia - Data Catalog

Description: data catalog for table visualization

  • Developed the Front End of the data catalog with Tailwind and prototyping with Figma
  • Created the Value Proposition Canvas, SWOT Matrix, and analyzed Porter's Five Forces
  • Organized daily meetings following Agile methodology best practices
HTML
Tailwind CSS
JavaScript
Github
VS Code
Node.js
SQLite
Agile
Teamwork

Cowo - Cozy Work Game (Softskills Training)

Description: game focused on teaching soft skills

  • Presented the MVP to the client Cia de Talentos
  • Programmed mini-games with GDScript (similar to Python)
  • Conducted usability tests and interviews with users and the client
GDScript
Github
UX/UI Design
Agile
Public Speaking
Teamwork

Drawing Journal

Description: A journal that allows users to express their days visually, adding more than words to their daily reflections.

The program includes

  • A drawing canvas for daily entries
  • Fields for a title, description, and the day's emotion
  • A tab to view previous entries
  • An analysis section to track emotional trends
React
TypeScript
Firebase
HTML
Tailwind CSS
Github
VS Code
Educational Background

Hi, my name is Leo. I’m a first-gen Brazilian student at Grinnell College, majoring in Computer Science, Economics, and Statistics.


In high school, I developed my skills through science olympiads, got experience in graphical and UX/UI design, and worked on tech projects for various institutions.

As a fellow at the Ismart Institute, my life was deeply impacted through education and I plan to continue my studies now focusing on Software Development and Data Science through personal projects.

Interested in any of these topics? Reach out to know more!

Grinnell College

Expected graduation:

2027

B.A. Computer Science and Economics, Statistics Concentration (Intended)


Relevant Coursework

  • OO Prob Slvg, Data Struc/Alg
  • Imperative Prob Solving w/lab
  • Functional Prob Solving w/lab
  • Statistical Modeling
  • Introduction to Data Science
  • Linear Algebra
  • Elementary Number Theory
  • Calculus II
  • Macroeconomic Analysis
  • Microeconomic Analysis
For recruiters

"His contributions were thoughtful, impactful, and well-documented."

"I fully recommend Leo for any opportunity in the data field, his performance during the Summer Program was outstanding and speaks volumes about his potential and character."

Supervised me at Ismart

"I had the opportunity to work with Leonardo on a recent project, and I was very impressed with his approach to personal and professional development."

"I highly recommend Leonardo to any team looking for someone dedicated, motivated, and willing to work hard to achieve the project's goals."

Worked with me at Inteli

"[...] he stood out for his insatiable curiosity and genuine interest in understanding the "why" behind things."

"This trait led him to single-handedly create a project, where he demonstrated not only initiative but also an impressive ability to swiftly and effectively resolve complex performance issues."

Worked with me at LyfeOS

Looking for opportunities on:

Summer 2026


Intern roles:

  • Fullstack Software Dev
  • Front-end Software Dev
  • Mobile Software Dev
  • Data Analyst
  • Data Engineer

Schedule an interview