Hi there! I'm
Gyujin Lee
Undergraduate ML Researcher• 5x Hackathon Winner
Building impactful AI solutions for
healthcare, accessibility, and beyond!
Researching when and why transformers generalize at the Deep Network Understanding Lab, Dickinson College
Hackathon Wins
Winning projects from top university hackathons in the United States
Sweet
iMessage-native AI assistant for diabetes management through conversational text messages
The Last Vigil
Learn American Sign Language by casting spells to defeat monsters.
Procrasti-Hater
The only productivity tool that hates you. Uses AI vision to catch slacking (phones, sleep, games) and mercilessly roasts you back to work in real-time.
CharAIdes
Real-time AI-powered charades game—communicate with AI through gestures alone.
Forge the World
Real-time survival defense RPG where you scan real objects with your camera—AI turns them into fantasy gear and a blacksmith roasts your inventory.
Personal Projects
Exploring ideas, technologies, and building solutions to make a difference
Experience
A journey through tech, service, and leadership
Honors Thesis Researcher
Deep Network Understanding Lab, Dickinson College
August 2026 – Present
Studying whether scratchpad tokens help micro-transformers generalize to symbol positions unseen in training, advised by Prof. John MacCormick. On a distance-threshold task, a counting scratchpad raised held-out accuracy from 67.4% (no positional encoding) and 49.5% (rotary) to 100% in 5 of 5 model seeds; length-matched dummy tokens did not help. On a counting task, dummy tokens alone raised held-out accuracy from 56% to 84%, versus 91% for a running-count scratchpad; studying why.
Summer Research Intern
Deep Network Understanding Lab, Dickinson College
June – July 2026
Independently designed and ran a study of whether the positional encoding decides generalization to symbol positions unseen in training; built the full PyTorch codebase (a from-scratch transformer under 1M parameters with five swappable positional encodings) and wrote the report. Across 50 runs, all five encodings fit the trained positions, but only relative ones (rotary, T5) and NoPE generalized reliably (mean 96–99% vs. 32–69% for absolute). Ablations traced a T5 failure to a trailing colon acting as a position anchor.
Undergraduate Researcher (COMP 560)
Deep Network Understanding Lab, Dickinson College
January – May 2026
Benchmarked nanoGPT training with two teammates across five hardware platforms, three model sizes, and three context lengths; loss was hardware-invariant, while speed and GPU energy use were not.
Resident Advisor
Student Life, Dickinson College
2022 – 2023, 2025 – Present
Leading a community of 15-40 residents and supporting student wellbeing in residential hall. Coordinating social events and facilitating community engagement and conflict resolution.
President
Korean Student Association
2025 – 2026
Led the Korean Student Association with 30+ members. Organized cultural events and managed the budget. Fostered community engagement among Korean students.
IT Specialist
Republic of Korea Army
September 2023 – March 2025
Ensured operational readiness for a 3,000-personnel brigade. Administered Linux systems, secured Apache servers, and managed network access for 500+ devices with NAC tools. Maintained 24/7 system availability and provided technical support.
Software Engineer Intern
MetapleBio
June – August 2023
Developed surgical image analysis tools for precision cancer and tumor removal surgery. Optimized C++ image processing algorithms for tumor detection systems. Redesigned UI for image analysis control panel using PyQt5, C++, and C# to improve user workflow efficiency.
Teaching Assistant
Mathematics Department, Dickinson College
August 2022 – May 2023
Supported 30+ students in Single Variable Calculus through weekly recitation sessions and one-on-one tutoring. Managed lab sessions, graded assignments and exams, and provided 7 hours of weekly support. Helped students develop problem-solving strategies and mathematical reasoning skills.
Sophomore Representative
CS & Math Majors Committee
2022-2023
Represented sophomore students in CS and Math departments. Participated in faculty meetings and advocated for curriculum improvements.
Secretary
Math & CS Club
2022-2023
Managed communications and operations for Math & CS Club with 180+ active members. Organized meetings and coordinated events. Facilitated collaboration and maintained membership records.
Skills
Technologies and tools I use
Programming Languages
Frameworks & Libraries
AI & Machine Learning
Tools & Infrastructure
APIs & Services
Beyond the code
Capturing moments from hackathons, military service, and campus life
Sweet team
CharAIdes team at PennApps XXVI
PennApps XXVI hackathon
Hackathon moments
Military service moments
Military service moments
Club activities
Resident Advisor moments
Sweet team
CharAIdes team at PennApps XXVI
PennApps XXVI hackathon
Hackathon moments
Military service moments
Military service moments
Club activities
Resident Advisor moments
Sweet team
CharAIdes team at PennApps XXVI
PennApps XXVI hackathon
Hackathon moments
Military service moments
Military service moments
Club activities
Resident Advisor moments
Sweet team
CharAIdes team at PennApps XXVI
PennApps XXVI hackathon
Hackathon moments
Military service moments
Military service moments
Club activities
Resident Advisor moments
Get in Touch
I'd love to hear from you! Whether you have a question, want to collaborate, or just want to say hi, feel free to reach out.