Yoon Jae Chang
Hello, I am

Ongoing and Completed Work

Check out some of my favorite projects and things I have worked on. This varies from personal projects, research, and things I have worked on for fun.

ShadowU

ShadowU's profile

A peer-to-peer marketplace connecting high school students with college hosts to experience authentic campus life.

Technologies

Next.js, TypeScript, Supabase, Supabase Auth and Edge Functions, Stripe, Tailwind CSS

Ideation

Ideation's profile

AI-powered idea generation tool that helps users prototype their ideas at the speed of light: hack creativity with AI.

Technologies

Next.js, Typescript, Supabase, Supabase Auth and Edge Functions, OpenAI (GPT-4o Mini, GPT-4o)

Viralysis

Viralysis's profile

AI and LLM research on understanding virality and recreating viral content on social media.

Technologies

Next.js, Typescript, Python, FastAPI, Gemini (VEO 3), Langfuse, OpenAI (GPT-4o Mini, GPT-o3 Mini)

OncoVAF

OncoVAF's profile

Developed computational antisense/sense RNA differential tool that integrates into bioinformatics workflows for cancer vaccines.

Technologies

Python, Docker, Immuno.cwl "Workflow", SAM/BAM/CRAM, MIT IGV

mFISHQuant

mFISHQuant's profile

Developed and validated methods for multiplex RNA mFISH imaging and qPCR expression analysis by creating R-based analysis pipelines.

Technologies

Python, R, QuPath

Professional Experience

I am a Computer Science student at Columbia University (the School of Engineering and Applied Science). My interests include AI/ML/Software engineering. Listed below is a timeline of my experiences that I have been involved in.

Aug 2025 – Present

AI & LLM Researcher

Computational Design Lab – Columbia University

Researching how large language models (LLMs) and AI can replicate and augment human cognitive strategies, advancing the lab’s human-AI collaboration work.

Jun 2025 – Aug 2025

Software Engineer & AI Intern

PointOne (YC W24)

Worked on AI-powered client-facing tools, optimizing LLM pipelines (with Langfuse) and retrieval-augmented generation (RAG) systems for enterprise users.

Jan 2025 – Apr 2025

Software Engineer Intern

Omen – Agentic Investing for All

Developed low-latency trading systems for AI-driven retail investing, and built a mobile UI/UX in React.js with Supabase authentication and database integration.

May 2023 – Aug 2023

Data Scientist Intern

Washington University School of Medicine

Developed computational pipelines for RNA imaging analysis and contributed to published cancer research on Nature journal.

Technical Skills And Technologies

Languages
  • Python
  • Java
  • JavaScript
  • TypeScript
  • Golang
  • SQL
  • HTML
  • CSS
  • Tailwind CSS
  • R
Frameworks
  • FastAPI
  • Flask
  • Next.js (React.js)
  • Express.js (Node.js)
Developer Tools & Libraries
  • NumPy
  • Pandas
  • Scikit-learn
  • Matplotlib
  • Git
  • GitHub
  • Docker
  • Supabase
  • PostgreSQL
  • LangChain
  • Langfuse

Get In Touch!

I'm always open to discussing new opportunities, exciting projects, or just having a chat. Feel free to reach out! Have a project in mind or want to collaborate? I'd love to hear from you. Let's create something together!