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Tyrrnien81/README.md

Leo Jeong · Software Engineer

Senior - Computer Science and Data Science @ UW-Madison
Shipping AI-powered products and real-time systems, from hackathons to Amazon Capstone.

june121284@gmail.comLinkedInPortfolio

🧑‍💻 About Me

  • I build software end-to-end, from system design to deployment, with a bias toward shipping fast and iterating with real users.
  • Most recently, I built a real-time multiplayer fashion game as part of an Amazon-sponsored capstone and an AI platform that streamlines U.S. immigration petitions.
  • I care about performance, clean architecture, and making complex workflows feel simple.

💻 Featured Projects

🛍️ Shopbop Showdown | Amazon Capstone

Real-time multiplayer fashion game where players compete to style the best themed outfit under budget & time pressure, then vote to decide the winner.

  • Designed the full game loop: lobby → product search → outfit submission → live voting → results
  • Tech: React · Node.js · Express · AWS (Lambda & DynamoDB) · Shopbop API · Gemini API
  • GitHubDemoLive↗

🛂 PathOne | AI Immigration Assistant

AI platform for helping founders and professionals assess EB-1A / O-1 visa eligibility, organize evidence, and generate prefilled petition documents using RAG.

  • Reduced legal complexity by productizing a multi-step immigration workflow into guided software.
  • Tech: React · Node.js · FastAPI · SQLite · Hugging Face · RAG
  • GitHubDemo

🧠 PulseMates | Mental Health Voice Check-in

Turns a 60-second voice recording into transcription, sentiment analysis, personalized coaching, and audio guidance.

  • Optimized API pipeline from 27.99s → 4.6s (6× faster) with crisis detection and campus resource integration.
  • Tech: React Native · Node.js · Express · MySQL · Docker · OpenAI API · Google Cloud TTS
  • GitHubDemo

📚 GROW | Student Course Community

Mobile platform for discovering courses, joining real-time chats, and sharing peer reviews at UW-Madison.

  • Designed a hybrid backend using Firebase for real-time features and a custom REST API for structured course, review, and analytics data.
  • Tech: React Native · Expo · Next.js · PostgreSQL · Firebase · Madgrades API
  • GitHub

🛠 Tech Stack

  • Languages: Python · Java · JavaScript · TypeScript · C · C++
  • Frontend: React · Next.js · React Native
  • Backend: Node.js · Express · Django · Flask · FastAPI
  • Data & Caching: PostgreSQL · MySQL · SQLite · MongoDB · Redis
  • Cloud & DevOps: AWS (EC2, Lambda, API Gateway, DynamoDB) · GCP (BigQuery) · Docker · GitHub Actions
  • AI & ML: PyTorch · TensorFlow · Scikit-learn · Hugging Face
  • Infrastructure: Kafka · Prometheus · Grafana

Pinned Loading

  1. Shopbop-Showdown Shopbop-Showdown Public

    Forked from Buman-Erdem/ShopBop-Showdown

    Shopbop curated fashion game app.

    JavaScript

  2. pathone pathone Public

    Forked from taliakusmirek/pathone

    The path to your O-1 or EB-1A. Built for the bold.

    TypeScript

  3. PulseMates PulseMates Public

    AI-Powered Mental Health Voice Check-in App.

    TypeScript

  4. GROW GROW Public

    Forked from wdragj/BuckyClass-mobile-ReactNative

    Building connections, sharing knowledge, fostering academic success.

    TypeScript

  5. LeNet-MiniPlaces LeNet-MiniPlaces Public

    LeNet-5 Convolutional Neural Network (CNN) architecture and customizes it for the MiniPlaces scene recognition dataset.

    Python

  6. Intro-to-PyTorch Intro-to-PyTorch Public

    Implementation of a neural network using PyTorch, designed to train, evaluate, and make predictions on the Fashion-MNIST dataset.

    Python