Jin Oh

Led about 90% of assigned projects end to end — architecture, database design, development, deployment and maintenance — working with Product Management, QA, Marketing, Training and RMA.

• Reverse-engineered an undocumented Java-applet licensing system into .NET, C# and Flutter Web, raising security-dongle data-transfer success from 65% to 97%.
• Migrated a PHP/CodeIgniter web app to React, Next.js, TypeScript and Material UI on AWS EC2 without changing the database schema — 32% faster page loads.
• Built a data pipeline that moved 300,000+ legacy records from Joomla to WordPress with restructured metadata and zero data loss.
• Built an AI task-tracking platform (Next.js, Supabase, Open WebUI) that automates daily executive summaries and SR&ED tax-credit reporting.
• Built and maintained the corporate WordPress site for eight years: training portal with automated certificates, regional pricebooks, brochure ordering and eCommerce.

Websites, platforms and apps for businesses across Canada — the full lifecycle, leading a team of six designers and developers when the work calls for it.

ASP.NET MVC eCommerce with Authorize.NET, a barcode-scanner price lookup app, and a giftable coupon system redeemed by barcode in store.

Navigation R&D for Hyundai Genesis. Tested and documented 10,000+ user scenarios.

• One Next.js codebase serves four products — marketplace, merchant admin, platform admin and every restaurant’s own SEO website — routed by host name.
• 65 Postgres tables, every one protected by row-level security; 104 migrations.
• Stripe Connect splits each payment automatically: the restaurant is paid out directly and the 5% platform fee is taken from the pre-tax subtotal only.
• New orders reach the kitchen tablet in real time (Supabase Realtime + FCM push) with a sound alert, and print on Bluetooth or Wi-Fi thermal printers.

Next.js 16 · React 19 · TypeScript · Supabase (Postgres, Auth, Realtime, Storage) · Stripe Connect · Expo / React Native · Firebase Cloud Messaging · ESC/POS · Vercel

• One sign-in serves three kinds of user — owner, staff and customer — resolved to the right tenant by a single database function.
• Public booking works without an account, yet anonymous users can never read the salon’s tables: all public writes go through SECURITY DEFINER RPCs.
• Automated SMS reminders run from a job queue processed by a scheduled Edge Function, cutting no-shows.
• Loyalty tiers are earned by spend or visit count and applied automatically at booking and checkout.

React 19 · TypeScript · Vite · Supabase (Postgres, Auth, Realtime, Edge Functions) · Capacitor · Expo / React Native · Stripe · Clover · Twilio · Gemini API · RevenueCat · Plaid

• Serves 100,000+ active Ontario property listings and manages 8,000,000+ metadata records.
• Interactive map loads and renders in under 1.2 seconds using viewport-bounded queries, zoom-aware server-side clustering and payload compression.
• Gemini-powered property intelligence combines Statistics Canada demographics and Google Places data into pros/cons summaries for buyers.
• Published natively to both the Apple App Store and Google Play from a single Flutter codebase.

Flutter · Dart · React · TypeScript · PHP (WordPress REST) · MySQL · Supabase (Postgres, Edge Functions) · CREA DDF / RETS · Mapbox · Google Maps · Gemini API · Firebase Auth & FCM · Stripe

• About 100,000 lines of code across both generations, with roughly 65 custom database tables.
• Order lifecycle pending → accepted → shipped → posted with explicit allowed transitions and full rollback of downstream data.
• Truck routes drawn on Google Maps in the dispatcher’s exact stop order, chunked to stay inside Directions API waypoint limits.
• Returns become credits that carry forward automatically to the customer’s next invoice.

React 18 · Vite · Supabase (Postgres, Auth, RLS, Edge Functions) · PHP · WordPress plugin architecture · MySQL · Google Maps Directions · SheetJS · Vitest