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Hello, I’m

Gabriel Castellon

Computer Science and Neuroscience double major with a Mathematics minor at the University of Toronto.
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Hey, I’m Gabriel. I’m studying Computer Science, Neuroscience, and Math at UofT’s St. George campus.

I love coding, life sciences, and math... and I LOVE fitness and cooking.

My courses cover coding, calculus, statistics, and biology, so I get to explore everything from solving problems with software to understanding the brain.

Outside of class, I stay connected to the CS community through CSSU. I’m also doing a focus in AI, and I love working in groups and sharing ideas.

Thank you for visiting! :)

Work Experience

  1. Work May 2024 – August 2024 LLM / Machine Learning Developer (Co-op) Factors Education
    • Produced consistent, structured inputs for LLM testing by developing Python scripts to clean and organize text-based datasets.
    • Identified recurring LLM response errors by testing prompt variations in Python and comparing generated outputs against expected answers.
    • Organized model evaluation results using Python, helping the team review performance and refine prompts more efficiently.
  2. Work January 2022 – September 2022 Beneficiary Agent American Income Life
    • Managed 100+ client and referral calls per day by explaining benefit options and scheduling follow-ups, resulting in 15–20 qualified appointments per week.
    • Updated and verified 500+ client records in the company CRM, resulting in fewer incomplete records and more reliable follow-up tracking.

Projects

Full-Stack Web Application

Shoe Marketplace

View project details

An online marketplace where users can create shops and list footwear for sale.

  • MongoDB
  • Express.js
  • React
  • Node.js
  • Built a footwear marketplace using MongoDB, Express.js, React, and Node.js, allowing users to create shops and list products for sale.
  • Connected the React frontend to a Node.js and Express backend, enabling marketplace data to move between the client, server, and database.
Android Application

Android Navigation App

View project details

A functional Android navigation app built with Kotlin, Google Maps API, and a connected database.

  • Kotlin
  • Android Studio
  • Google Maps API
  • Developed a functional navigation app in Android Studio using Kotlin.
  • Integrated Google Maps API and connected the app to a database.

Skills & interests

Languages

  • Python
  • Java
  • JavaScript
  • TypeScript
  • HTML/CSS
  • R
  • SQL
  • LaTeX
  • Kotlin

Development

  • Git
  • Node.js
  • React
  • Next.js
  • jQuery
  • MongoDB
  • Android Studio
  • IntelliJ
  • Eclipse
  • Babel

Machine Learning & AI

  • Machine Learning
  • Deep Learning
  • Computer Vision
  • Neural Networks
  • Research
  • Benchmarking
  • TensorFlow
  • PyTorch
  • Scikit-learn

Cloud & Tools

  • AWS
  • Google Cloud Platform
  • PowerPoint
  • Firebase
  • Azure
  • MATLAB
  • Linux
  • Microsoft Suite

Leadership

  • Leadership
  • Event Planning
  • Budgeting
  • Marketing
  • Project Management
  • Mentoring
  • Teamwork

Additional Interests & Skills

  • Communication
  • Problem Solving
  • Debugging
  • Accessibility

Let’s connect

I’m always open to new opportunities, collaborations, and conversations. Feel free to reach out.