Looking for a job

Jin OH

@jinoh

Software engineer behind Koranee, a mobile app for Korean working holidaymakers with real-time chat and 400+ registered users.

Australia

Message

I built and launched Koranee, a mobile app for Korean working holidaymakers and students in Australia. I handled its planning, UI design, frontend, backend, deployment and store release, bringing jobs, shared rooms, a marketplace and a community board into one app.

At MediTrust, I worked on anaesthetic billing software, including an authenticator-app 2FA feature that about 25% of users switched to. I also rebuilt the patient-list PDF importer, raising its success rate from about 80% to over 98%, and worked with another developer on the Spring Boot API for a mobile app.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Mobile App Developer

Current

Koranee

May 2026 - Present (5 months)

Built and launched a native mobile app for Korean working holidaymakers and students, featuring real-time chat, jobs, shared rooms, marketplace, and community board. Reached 400+ registered users on the App Store and Google Play.

React Native Expo TypeScript Spring Boot PostgreSQL Redis WebSockets AWS JWT SSO RevenueCat Google Maps SDK

Software Developer

MediTrust

Aug 2023 - Apr 2026 (2 years 8 months)

Developed anaesthetic billing software, including mobile API server, 2FA, PDF import, payment gateway, and electronic prescribing module integrations. Improved PDF import success from ~80% to over 98% and added authenticator-app 2FA.

Java Spring Boot REST APIs PostgreSQL 2FA PDF Processing Payment Gateways EScripting