Tefuda
Poker solitaire with a push-your-luck streak — place cards, spend your discards wisely, and stack perks to climb levels.
Peng-Yu Chen
Software Engineer New York
About
Bio
Hi, I'm Peng-Yu Chen, originally from the beautiful island of Penghu in Taiwan.
I build apps for a living and for fun. By day I'm a Software Engineer in NYC; by night I'm shipping side projects and iOS apps, usually chasing whatever idea won't leave me alone.
I care a lot about craft — clean code, thoughtful conventions, and the little details that make software feel just right. It shows up in what I ship: apps that stay minimal and friendly, with nothing to figure out and nothing in your way. Try a few — they are all a click or a download away.
Now
These days I am making games. Tefuda is a cozy poker game I built, and my friends are already addicted to it.
So if you don't want to lose an afternoon, don't click playtefuda.com 🤣
Fun Facts
Wendy's Chicken is my first meal in the US.
C is the first programming language I learned.
I know a little Japanese, mostly picked up from anime.
My cat is named "Lola".
Apps I Wish Exist
playtefuda.com
Zestimer
Native iOS HIIT/interval workout timer with voice cues, haptics, and an AI workout builder.
Furioke
Turns songs you already stream into Japanese lessons — synced lyrics, furigana, and flashcards on web, iOS, and Android.
AppShapr
Drop in your screens, style them, and export every size and language the App Store asks for.
Open Source
CLRS Solutions
Solutions to exercises and problems in Introduction to Algorithms (CLRS) — 5K+ stars, 1K+ forks on GitHub.
LeetCode Solutions
Readable solutions to 3,500+ LeetCode problems in C++, Java, and Python.
Work
Software Engineer
June 2022 - Present
New York, NY
Snap Inc.
Software Engineer
March 2022 - June 2022
New York, NY
- Built messaging infrastructure for a single and consistent logic in C++ to bridge iOS and Android with backend
- Sped up the messaging experience in fetching feed and syncing feed by parallelization for 20% through A/B study
- Implemented GoogleTest to cover 99% of the business logic in both unit testing and integration testing
Meta
Software Engineer Intern
May 2021 - August 2021
New York, NY
- Established GraphQL APIs by Hack and created Python scripts that call the APIs to onboard Jest tests, allowing iOS and Android developers to have a uniform script to onboard newly written Jest tests
- Recommended trial numbers to lower the standard deviation of metric values by over 25% for three Jest tests
- Tinkered new formula for reasonable trial numbers with senior engineers and reported the process in daily standup
Education
New York University
M.S. in Computer Science
2020 - 2021
New York, NY
National Taiwan University
B.S. in Computer Science
2015 - 2018
Taipei, Taiwan