Sang Park
I'm a |
I build products that solve real problems. From concept to launch, I focus on execution speed and user impact.
About Me

Building Products That Matter

I'm a product engineer who believes in execution over perfection. While others debate, I build. My approach is simple: identify real problems, ship fast, iterate based on feedback.

From LeetProduct (Leetcode for PMs) to VariantAB (AI-powered LinkedIn optimization), I focus on products that solve immediate pain points. Speed is my competitive advantage—I can go from idea to launched product faster than most teams can write a spec.

When I'm not building, I'm angel investing in early-stage startups, helping other builders turn their ideas into reality. I believe the best products come from understanding real user problems, not following trends.

Skills & Expertise

Product Strategy
Full-Stack Development
React & Next.js
TypeScript
Node.js
Python
UI/UX Design
Data Analysis
SQL
Angel Investing
10+
Products Launched
10+
Years Building
Problems to Solve

Featured Projects

A collection of products I've built, from concept to launch. Each project represents a unique challenge and learning experience.

LeetProduct
Live

LeetProduct

LeetCode for Product Managers - Practice product management skills with real-world scenarios and case studies.

Next.jsTypeScriptTailwind CSSSupabase
View Project
VariantAB
Live

VariantAB

AI-powered LinkedIn post analysis tool that helps optimize content performance and engagement.

ReactNode.jsOpenAI APIPostgreSQL
View Project
Quizings
Live

Quizings

Personality tests and quizzes platform with engaging interactive experiences.

Next.jsReactMongoDBTailwind CSS
View Project
BuyWhoa
Live

BuyWhoa

Product discovery platform helping users find unique and interesting products.

ReactExpress.jsMySQLAWS
View Project
ResumeHey
Live

ResumeHey

AI-powered resume optimization tool that helps job seekers improve their resumes.

Next.jsOpenAI APIStripeVercel
View Project
ReactionTimer
Completed

ReactionTimer

Mobile game testing reaction time and reflexes with engaging gameplay mechanics.

React NativeExpoTypeScriptAsyncStorage
WSIE
Live

WSIE

Restaurant recommendation app helping users discover great dining experiences.

React NativeFirebaseGoogle Places APIRedux
View Project
Add to Calendar
Live

Add to Calendar

Chrome extension for Tock reservations that automatically adds restaurant bookings to your calendar.

JavaScriptChrome Extension APICalendar API
View Project

Photography

Capturing moments and stories through the lens. A collection of visual narratives exploring light, composition, and the beauty in everyday scenes.

Photography by Sang Park

Water

Boston

Photography by Sang Park

Dog

Los Angeles

Photography by Sang Park

Lights

Los Angeles

Photography by Sang Park

Train

San Diego

Photography by Sang Park

Flowers

La Jolla

Photography by Sang Park

Diamond

Hawaii

More photography coming soon. Always exploring new perspectives.

View Full Portfolio on Flickr

Let's Connect

Let's connect and explore opportunities to build something amazing together.