Seeking Full-Time Opportunities

Jeewon Kim

CS @ Columbia (GPA 3.88 · May 2026). Full-stack developer focused on AI systems, distributed apps, and social impact products.
Previously at Generous Health and TVCF, and founder of Tchelp.org.

Featured Projects

Tchelp.org — Tech Support Platform

Full-Stack

Founder & Lead Developer · 2025 — Present

  • React + FastAPI, Supabase, Cloudflare CDN.
  • Launched to 1,000+ unique visitors and 13,000+ requests in the first month.

Visit site

YOLO + PPO Game Agent (Vision → Policy)

AI/ML

PyTorch · Ultralytics YOLO · Reinforcement Learning

  • Trained a vision-based agent: YOLO detections are encoded into a 26-D state and fed to a PPO policy.
  • Used behavioral cloning from a heuristic expert to bootstrap PPO and prevent degenerate "camping" behaviors.
  • Implemented a reproducible pipeline: GameCore (training) + web_app (Socket.IO demo).

Visit repo

Logical Benchmark — Research

Research

LLM strategic reasoning on rule-based games (Advisor: Prof. Tony Dear)

  • Python framework for self-play and evaluation (win rate, move validity).
  • Designed metrics to assess model decision-making.

AI-Powered Reading Feed

Full-Stack

GraphQL middleware + AWS EC2 backend

  • Personalized recommendation pipeline and scalable endpoints.

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ImposterAI — AI Social Deduction Game

Hackathon

MIT Hackathon · Raspberry Pi · Arduino · AI

  • AI-powered Imposter-style tabletop game where AI acts as both host and deceptive player.
  • Physical lotus-shaped device with LED coasters; Raspberry Pi + Arduino for hardware control.
  • AI generates context-aware lies and deception strategies during live gameplay.

Visit repo

Experience

Generous Health LLC — Founding Engineer

May 2024 — Present · Los Angeles (Remote-friendly)

  • Enabled two non-technical teammates to ship backends (FastAPI/Flask), cutting delivery time by ~25%.
  • Stabilized workflows and integrations; improved backend architecture.

TVCF — Software Engineer

Jun 2024 — Aug 2024, Summer 2025 · Seoul

  • Built RAG-powered tagging API; improved ad-video tagging efficiency by ~50%.
  • Boosted Elasticsearch search accuracy ~40%.
  • Developed multi-agent ad campaign generator with LangGraph; cut API cost ~30% (GPT-4o + Claude Sonnet mix).

Korean Army — IT Technician

Oct 2020 — Apr 2022 · Goyang-si

  • Managed TACS security, Linux devices, and wireless systems; handled IP/network hygiene.

More Repositories

CustomAIChatBot

AI/ML

LLM Application

Source →

MiddleWarePython

Backend

Python Backend

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simple_mongodb

Backend

Python Backend

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p5.js Sketch

Creative

Creative Coding

Open →