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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Jeewon Kim — Personal Site</title>
<meta name="description" content="Jeewon Kim — CS @ Columbia University. Full-stack developer focused on AI systems, distributed apps, and social impact projects." />
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap" rel="stylesheet">
<link rel="stylesheet" href="styles.css" />
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@type": "Person",
"name": "Jeewon Kim",
"jobTitle": "Software Engineer / CS Student",
"affiliation": {"@type": "CollegeOrUniversity", "name": "Columbia University"},
"url": "https://github.com/gitgutgit",
"email": "mailto:jk4864@columbia.edu",
"address": {"@type": "PostalAddress", "addressLocality": "Fort Lee", "addressRegion": "NJ", "addressCountry": "US"}
}
</script>
</head>
<body>
<header class="hero">
<div class="container">
<span class="badge">Seeking Full-Time Opportunities</span>
<h1>Jeewon Kim</h1>
<p class="lead">CS @ Columbia (GPA 3.88 · May 2026). Full-stack developer focused on <strong>AI systems</strong>, <strong>distributed apps</strong>, and <strong>social impact</strong> products.<br>Previously at Generous Health and TVCF, and founder of Tchelp.org.</p>
<div class="actions">
<a class="btn primary" href="mailto:jk4864@columbia.edu">Email Me</a>
<a class="btn" href="https://github.com/gitgutgit" target="_blank" rel="noopener">GitHub</a>
<a class="btn" href="#projects">Featured Projects</a>
<a class="btn" href="#experience">Experience</a>
</div>
</div>
</header>
<div class="wrap">
<div class="container">
<section id="projects" class="reveal">
<h2 class="section-title">Featured Projects</h2>
<div class="cards">
<article class="card" data-category="fullstack">
<h3>Tchelp.org — Tech Support Platform</h3>
<span class="tag fullstack">Full-Stack</span>
<p class="meta">Founder & Lead Developer · 2025 — Present</p>
<ul class="list">
<li>React + FastAPI, Supabase, Cloudflare CDN.</li>
<li>Launched to 1,000+ unique visitors and 13,000+ requests in the first month.</li>
</ul>
<p><a href="http://tchelp.org/" target="_blank" rel="noopener">Visit site</a></p>
</article>
<article class="card" data-category="ai">
<h3>YOLO + PPO Game Agent (Vision → Policy)</h3>
<span class="tag ai">AI/ML</span>
<p class="meta">PyTorch · Ultralytics YOLO · Reinforcement Learning</p>
<ul class="list">
<li>Trained a vision-based agent: YOLO detections are encoded into a 26-D state and fed to a PPO policy.</li>
<li>Used behavioral cloning from a heuristic expert to bootstrap PPO and prevent degenerate "camping" behaviors.</li>
<li>Implemented a reproducible pipeline: <code>GameCore</code> (training) + <code>web_app</code> (Socket.IO demo).</li>
</ul>
<p><a href="https://github.com/gitgutgit/YOLO-You-Only-Live-Once" target="_blank" rel="noopener">Visit repo</a></p>
</article>
<article class="card" data-category="research">
<h3>Logical Benchmark — Research</h3>
<span class="tag research">Research</span>
<p class="meta">LLM strategic reasoning on rule-based games (Advisor: Prof. Tony Dear)</p>
<ul class="list">
<li>Python framework for self-play and evaluation (win rate, move validity).</li>
<li>Designed metrics to assess model decision-making.</li>
</ul>
</article>
<article class="card" data-category="fullstack ai">
<h3>AI-Powered Reading Feed</h3>
<span class="tag fullstack">Full-Stack</span>
<p class="meta">GraphQL middleware + AWS EC2 backend</p>
<ul class="list">
<li>Personalized recommendation pipeline and scalable endpoints.</li>
</ul>
<p><a href="https://github.com/Gnosis-Media" target="_blank" rel="noopener">Visit repos</a></p>
</article>
<article class="card" data-category="ai hackathon">
<h3>ImposterAI — AI Social Deduction Game</h3>
<span class="tag hackathon">Hackathon</span>
<p class="meta">MIT Hackathon · Raspberry Pi · Arduino · AI</p>
<ul class="list">
<li>AI-powered Imposter-style tabletop game where AI acts as both host and deceptive player.</li>
<li>Physical lotus-shaped device with LED coasters; Raspberry Pi + Arduino for hardware control.</li>
<li>AI generates context-aware lies and deception strategies during live gameplay.</li>
</ul>
<p><a href="https://github.com/gitgutgit/mit-hardmode-ImposterAI" target="_blank" rel="noopener">Visit repo</a></p>
</article>
</div>
</section>
<section id="experience" class="two-col reveal">
<div>
<h2 class="section-title">Experience</h2>
<article class="card">
<h3>Generous Health LLC — Founding Engineer</h3>
<p class="meta">May 2024 — Present · Los Angeles (Remote-friendly)</p>
<ul class="list">
<li>Enabled two non-technical teammates to ship backends (FastAPI/Flask), cutting delivery time by ~25%.</li>
<li>Stabilized workflows and integrations; improved backend architecture.</li>
</ul>
</article>
<article class="card">
<h3>TVCF — Software Engineer</h3>
<p class="meta">Jun 2024 — Aug 2024, Summer 2025 · Seoul</p>
<ul class="list">
<li>Built RAG-powered tagging API; improved ad-video tagging efficiency by ~50%.</li>
<li>Boosted Elasticsearch search accuracy ~40%.</li>
<li>Developed multi-agent ad campaign generator with LangGraph; cut API cost ~30% (GPT-4o + Claude Sonnet mix).</li>
</ul>
</article>
<article class="card">
<h3>Korean Army — IT Technician</h3>
<p class="meta">Oct 2020 — Apr 2022 · Goyang-si</p>
<ul class="list">
<li>Managed TACS security, Linux devices, and wireless systems; handled IP/network hygiene.</li>
</ul>
</article>
</div>
<aside>
<h2 class="section-title">At a Glance</h2>
<div class="card">
<div class="skill-chips">
<span class="chip" data-group="language">Java</span>
<span class="chip" data-group="language">Python</span>
<span class="chip" data-group="language">JavaScript</span>
<span class="chip" data-group="language">C++</span>
<span class="chip" data-group="language">C#</span>
<span class="chip" data-group="framework">React</span>
<span class="chip" data-group="framework">FastAPI</span>
<span class="chip" data-group="framework">Flask</span>
<span class="chip" data-group="infra">Docker</span>
<span class="chip" data-group="infra">MongoDB</span>
<span class="chip" data-group="infra">MySQL</span>
<span class="chip" data-group="ai">PyTorch</span>
<span class="chip" data-group="infra">AWS</span>
<span class="chip" data-group="ai">RAG</span>
<span class="chip" data-group="ai">LangGraph</span>
</div>
</div>
<div class="card">
<h3>Education</h3>
<p class="meta">Columbia University — B.S. in Computer Science</p>
<ul class="list">
<li>GPA 3.88 · Expected May 2026</li>
</ul>
</div>
<div class="card">
<h3>Leadership</h3>
<p class="meta">AI Storytelling Lead · Oct 2024 — Jan 2025</p>
<ul class="list">
<li>Workshops on NLP, multimodal storytelling; operations lead.</li>
</ul>
</div>
<div class="card contact">
<h3>Contact</h3>
<div>
<a href="mailto:jk4864@columbia.edu">jk4864@columbia.edu</a>
<div>Fort Lee, NJ · United States</div>
<div>GitHub: <a href="https://github.com/gitgutgit" target="_blank" rel="noopener">github.com/gitgutgit</a></div>
</div>
</div>
</aside>
</section>
<section class="reveal">
<h2 class="section-title">More Repositories</h2>
<div class="cards">
<article class="card">
<h3>CustomAIChatBot</h3>
<span class="tag ai">AI/ML</span>
<p class="meta">LLM Application</p>
<p><a href="https://github.com/gitgutgit/CustomAiChatBot" target="_blank" rel="noopener">Source →</a></p>
</article>
<article class="card">
<h3>AnalysisAiBot</h3>
<span class="tag ai">AI/ML</span>
<p class="meta">LLM Application</p>
<p><a href="https://github.com/gitgutgit/AnalysisAiBot" target="_blank" rel="noopener">Source →</a></p>
</article>
<article class="card">
<h3>MiddleWarePython</h3>
<span class="tag misc">Backend</span>
<p class="meta">Python Backend</p>
<p><a href="https://github.com/gitgutgit/MiddleWarePython" target="_blank" rel="noopener">Source →</a></p>
</article>
<article class="card">
<h3>simple_mongodb</h3>
<span class="tag misc">Backend</span>
<p class="meta">Python Backend</p>
<p><a href="https://github.com/gitgutgit/simple_mongodb" target="_blank" rel="noopener">Source →</a></p>
</article>
<article class="card">
<h3>Crime Insight</h3>
<span class="tag fullstack">Full-Stack</span>
<p class="meta">Frontend + Backend</p>
<p><a href="https://crime-insight-deploy.onrender.com" target="_blank" rel="noopener">Demo →</a> · <a href="https://github.com/gitgutgit/Crime-insight" target="_blank" rel="noopener">Source →</a></p>
</article>
<article class="card">
<h3>p5.js Sketch</h3>
<span class="tag misc">Creative</span>
<p class="meta">Creative Coding</p>
<p><a href="p5sketch.html" target="_blank" rel="noopener">Open →</a></p>
</article>
</div>
</section>
<footer>
<div>© <span id="year"></span> Jeewon Kim — Built with HTML/CSS. Deployed on GitHub</div>
</footer>
</div>
</div>
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