Caleb Lee

I love backend and infrastructure, as well as consumer tech. Current senior at the University of Minnesota.

I grew up writing code (shoutout to my 5th grade coding club) and it's a lifelong dream of mine to become apart of something at the tech frontier. In my free time, I play guitar and sometimes watch Formula 1. Illinois native.

Reach me at

My projects

Projects

Click on any project to expand

Juno

November 2026

Juno is a lightweight baseline for an agentic SWE. Juno turns GitHub issues into reviewable draft PRs with Codex agents running in isolated Daytona sandboxes.

OpenAI
GitHub
TypeScript
Docker
Hono

Hourly DSA

September 2026

Hourly DSA is an iOS app for building coding interview pattern recognition through short, daily practice. Built with React Native, Expo, and Convex, featuring Home and Lock Screen widgets.

App Store
React
Expo
Convex
Instagram
TikTok
PostHog

Downloads: 500+
Weekly active users: 100+

I created Hourly DSA as a side project and a challenge. I enjoy consumer products and wanted to see if I could build and market my own iOS app. Hourly DSA is a simple subscription widget/app that shows a variety of LeetCode style questions. It was designed in Figma, implemented in React Native, Expo, and Convex with Adapty for billing. I ran my own marketing campaigns on Tiktok and Instagram, resulting in about 500 downloads over the first couple months.

Other

I served as treasurer for the Korean Student Association for the 2025–2026 school year
- 300+ total attendees
I was a research assistant during summer 2026 on FedSkyline: Secure and Efficient Skyline Query Answering over Vertical Data Federations
My team placed second at Microhacks (Minnehacks) in February 2024
- We made an iOS app for speech feedback and conversation practice, built with Swift, speech recognition, and AI
I love reading tech blogs and papers, below are some of my favorites
- How Discord Stores Trillions of Messages
- Kafka: a Distributed Messaging System for Log Processing
- The Legends of Runeterra CI/CD Pipeline
- Khan Academy’s successful monolith→services rewrite
In highschool and college, I played electric guitar for my church