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Tyrrnien81/README.md

Leo Jeong

Backend Software Engineer · Distributed Systems & AI Agent Infrastructure
BS in Computer Science & Data Science, UW-Madison '26

june121284@gmail.comLinkedInPortfolio

🧑‍💻 About Me

  • I build software end-to-end, from system design to deployment, and iterate with real users.
  • Just wrapped up an Amazon-sponsored capstone (real-time multiplayer game on AWS), with recent open-source contributions to robotmcp/ros-mcp-server, a 1.2K+ stars AI-to-robot bridge in the MCP ecosystem.
  • I care about performance, clean architecture, and making complex workflows feel simple.
  • 📩 Open to full-time software engineering opportunities starting May 2026, particularly backend, AI agent infrastructure, and distributed systems roles.

🌐 Open Source Contributions

🤖 ROS-MCP-Server | AI-to-Robot Bridge in the MCP Ecosystem

1.2K+ stars / 180+ forks · 3 PRs and 3 issues authored (March-April 2026)

  • macOS docs fix (merged): diagnosed a zsh -lc PATH resolution issue across three rc-file modes and shipped a one-line docs patch that preserved the project's one-copy-paste install UX. PR #311
  • Unit-test infrastructure design (merged): proposed and built the first tests/unit/ directory using tmp_path and monkeypatch, then trimmed scope from 47 tests to 12 after a collaborator pointed out overlap with the in-flight integration suite. PR #309
  • Cross-platform devcontainer fix (merged): diagnosed a three-layer macOS failure (NVIDIA toolkit, X11 socket, silent xhost failure) and shipped a minimal-blast-radius config and docs change. PR #303

💻 Featured Projects

🛍️ Shopbop Showdown | Amazon Capstone

Real-time multiplayer fashion game where 4-8 players compete to style the best themed outfit under budget and time pressure, then vote to decide the winner.

  • Architected a hybrid backend (Socket.IO for real-time events, Lambda for AI-driven image generation), cutting try-on latency 67% via parallel invocations.
  • Persisted game state across 4 DynamoDB tables and integrated Shopbop's 30,000+ product catalog.
  • 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.

  • Integrated Mistral-7B via Hugging Face to score applicants against the 10 EB-1A criteria, with a rule-based fallback for reliability.
  • Ranked Top 10 among 300+ participants in a 24-hour hackathon.
  • Tech: React · Node.js · Express · FastAPI · SQLite · Hugging Face
  • 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 to 4.6s (83% latency reduction) using dual-path inference caching and parallel request handling.
  • Integrated crisis detection and campus resource referrals.
  • 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 chat 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 · MCP / FastMCP
  • 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. SceneScope SceneScope Public

    A custom PyTorch CNN that improves MiniPlaces scene recognition accuracy by 2.5 times over a LeNet baseline and analyzes its detection power the way a machine vision inspection system would.

    Python

  4. PulseMates PulseMates Public

    AI-Powered Mental Health Voice Check-in App.

    TypeScript

  5. GROW GROW Public

    Forked from wdragj/BuckyClass-mobile-ReactNative

    Building connections, sharing knowledge, fostering academic success.

    TypeScript

  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