Justin Rosales

A highly opinionated workout app tailored to my personal gym logging workflow, cutting out paywalls and social bloat. Built as a universal iOS and Web app using Expo Router and NativeWind, with Zustand for instant offline tracking and Supabase PostgreSQL.

A secure expense-splitting web app featuring 100% client-side real-time facial recognition via TensorFlow.js to dynamically track user presence and allocate utility costs, integrated with Auth0 authentication. Won 1st Place for 'Best Use of Auth0' at MHacks 2025.

A real-time competitive mental math duel game where players race head-to-head solving arithmetic problems within a 120-second time limit using deterministic seeded problem generation for fairness.

A neuroevolution simulation in Python evolving feedforward neural networks via the NEAT algorithm to play Flappy Bird autonomously, surpassing human-level consistency within 10 generations of 50 agents.