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dona_jason

Seungyong Oh

@dona_jason

Full Stack Developer, Shopify Automation, Korean Market Support

Zuid-Korea
Koreaans
Sommige informatie wordt in het Engels weergegeven.
Over mij
I’m a web developer and independent product builder based in South Korea. I build and maintain full-stack web applications using React, Next.js, TypeScript, APIs, and databases. I independently built and launched DoNa, a web and mobile date-course recommendation service, and developed QuoteCrate, a Shopify B2B quoting app. I also help international clients with Korean localization, supplier research, competitor research, local business research, and Korea market research. I focus on clear communication, practical solutions, reliable delivery, and organized results clients can use immediately.... Lees meer

Skills

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dona_jason
Seungyong Oh
offline • 
Gemiddelde reactietijd: 14 uur

Bekijk mijn diensten

Inkoop- en leveranciersbeheer
I will research korean suppliers for your business
VanafUS$ 25 / projectMeer informatie
Redigeren AI-content
I will localize ai translated korean for apps and websites
VanafUS$ 10 / projectMeer informatie

Portfolio

Werkervaring

Shopify

Shopify Web App Developer

Shopify • ZZP

Jul 2026 - Present • 4 mos

Built QuoteCrate, a Shopify B2B quoting web app for wholesale merchants. Developed the full workflow from customer quote requests to merchant pricing, quote approval, and Shopify Checkout. Integrated Shopify APIs, billing, webhooks, authentication, PostgreSQL, email verification, and deployment using Remix, Railway, and Resend. Completed end-to-end testing with successful test orders and launched the app on the Shopify App Store.

Self-Employed_/ Freelancer

Founder and Full Stack Developer

Self-Employed / Freelancer • Fulltime

Oct 2025 - Present • 1 yr 1 mo

Built, launched, and currently operate DoNa, a date-course recommendation web and mobile service in South Korea. Independently handled product planning, responsive frontend development, backend APIs, database integration, authentication, payments, location-based features, recommendation logic, admin tools, deployment, and ongoing maintenance. Released the service across web, iOS, and Android and continue improving it based on real usage and user needs.

Quantum

Data Quality Assurance Freelancer

Quantum • Freelance

Jul 2024 - Jan 2025 • 6 mos

Reviewed and validated OCR-extracted text for AI training datasets. Identified extraction errors, checked data accuracy, and followed structured quality guidelines to ensure consistent and reliable results.