Member app · iOS & Android
UP-Dream
A place for community, reflection, and the next small step.
- TypeScript
- React Native
- Expo
- PostgreSQL
Software engineer · Korean & Japanese · Korea → Japan
From an everyday need
to an app people can use.
I’m Yi Suheon. I take products from planning and design through development, release, and operation. I built and run UP-Dream, used every week by a church youth group, as a member app on iOS and Android, an admin web console, a native admin app, and a shared API. Japanese is my second native language.
67%of regular attendees use UP-Dream
04Store-released apps · App Store 3, Google Play 1
N1Native-level Japanese · one year at Tokyo City University
01 / Selected work
Built for real routines.
Two products, four store-released apps. Each case study connects the interface to the decisions behind it.
Native admin app · iPhone & iPad
UP-Dream Admin
The right tools for the people looking after a community.
- Swift
- SwiftUI
- URLSession
- Keychain
Native coffee journal
Naerim · 내림
Remember what made this cup worth making again.
- Swift
- SwiftUI
- SwiftData
- WidgetKit
Screenshots use synthetic demo data. Project pages include capture dates and full-size views.
02 / Engineering
Technology, with a purpose.
The tools I use, connected to work you can inspect.
Native interfaces
Swift · SwiftUI · Observation
Naerim and UP-Dream Admin; native integrations in the Expo member app.
Data that keeps its meaning
SwiftData · Foundation · SQL
Historical brew snapshots, explicit saves, session recovery, and transactional attendance changes.
Connected services
TypeScript · React Native · React · PostgreSQL
UP-Dream member app on iOS and Android, admin web, shared APIs, and permission-checked data access.
Delivery and verification
GitHub Actions · XCTest · AWS ECS Fargate
Recorded regression checks, container deployment configuration, and source-linked release evidence.
A small piece you can run
Recipe quantity validation
Explore Naerim’s numeric boundaries, proportional water scaling, and draft preservation in a standalone Swift package.
03 / Collaboration
Work built with others.
Stack Snapshot
Backend contributor · six-person team
Implemented QR generation and photo-download functionality for an event photo-booth service. The team used Java, Spring Boot, JPA, and MySQL.
See my contributionGyeongju Hackathon 2024
Python / Django backend · Team Null
A tourism experience service combining reservations with photo-layer collection and composition. Our team received second place overall.
Explore the team project04 / About
Curious about how things work.
Careful about how they feel.
I study Computer Engineering at Dongguk University WISE. I lived in Japan from 2001 to 2014 and speak Japanese at a native level, and a year in the Faculty of Information Technology at Tokyo City University shaped my goal of working as a software engineer in Japan. I enjoy turning a familiar routine into software that is easier to use and easier to maintain.
- Dongguk University WISE
- Computer Engineering · graduating March 2027
- Tokyo City University
- One-year exchange · Faculty of Information Technology · Apr 2025 – Mar 2026
- Lived in Japan · 2001–2014
- Native-level Japanese · JLPT N1 (Dec 2023)
- StackUp · 2nd cohort
- Collaborative learning and programming practice · 2023
05 / Contact
Let’s talk about
what comes next.
I’m interested in software development opportunities in Japan and conversations about useful, thoughtfully built products.
suheon777@icloud.com GitHub profile