YoonChae
Implementing with AI
Driven by a deep passion for exploring and implementing emerging technologies, my journey into AI began with the complex challenges of autonomous robot soccer. This foundation naturally evolved into a broader expertise in IoT sensor integration and advanced machine learning architectures. Currently, I am specializing in building sophisticated Agentic workflows using LLMs and LangGraph, transforming cutting-edge research into functional, business-oriented solutions. I remain dedicated to leveraging the rapid advancements in AI to solve intricate problems and deliver innovative digital experiences.
Erin: Autonomous AI Agent
Role: Software Engineer @ AptAmigo
Developed 'Erin,' an autonomous AI engagement system designed to handle real-time lead follow-ups. By architecting a scenario-driven agent workflow, Erin infers renter preferences such as budget, neighborhoods, and move-in dates from SMS interactions. The system automates complex tasks including personalized tour list generation and scheduling, ensuring seamless engagement outside business hours. This implementation successfully generated 15+ additional leads per day, significantly contributing to sales conversion and agent retention.
Screenshot of the project image
Development: LangGraph, TypeScript, Node.js
AI Models: Claude 3.5 Sonnet, GPT-4o
Infrastructure :AWS Lambda (Serverless), MongoDB
Robot Soccer
Role: Software Engineer
As a founding member of the BuckyBots team, I led the software development for the Nao robot platform from the ground up. To overcome the data scarcity and time constraints of physical robot training, I engineered a high-speed simulation environment using PyGame. This Digital Twin approach enabled data acquisition at 500 samples per second—roughly 2,500 times faster than physical hardware—accelerating the development of robust reinforcementSim2Realreinforcement learning models.

My technical contributions spanned the entire robotics stack: utilizing OpenCV for real-time perception of balls and field markers, implementing table-Baselines3 for behavioral planning, and optimizing robot gait and control in C++based on the B-Human framework. These efforts culminated in securing 3rd place in the Standard Platform League at RoboCup 2023 in France.
Technologies Used
Perception : ball/field recognition (OpenCV)
Planning : optimize path (Sim2Real, stablebaseline)
Control : robot movements (C++, B-human)
Secured 3rd place at RoboCup 2023 in France
Description Paper
IoT Control system
: from sensor to the web
Role: Hobby
Explored the integration of hardware and cloud software through a custom IoT monitoring system. I performed precision soldering and hardware integration for the BME280 sensor via I²C communication on a Raspberry Pi. The system features a Python Flask backend that processes environmental data in the cloud, providing a real-time web dashboard for monitoring room temperature and humidity alongside personal schedule management. This project demonstrates my ability to bridge the gap between physical sensors and web-based data visualization.
Technologies Used
Hardware : Raspberry-Pi, BME280(I²C)
Framework : Python Flask
Call
608-770-3823
Write
yoonchae.na@gmail.com
Follow