Shopify App Developer Needed — Retail Selling Dashboard (Next.js, Full Build)

We are building Selling Dashboard — a Shopify-connected weekly sales reporting tool for DTC brand managers. Think of it as a retail buying office selling report, built natively on Shopify. WTD/MTD/QTD/YTD, TY vs LY, Regular vs Markdown, AUR, Weeks on Hand — all live, all automatic, no more Excel. This is not a greenfield project. We have done significant pre-work: Full product specification (v4.0, 34 locked decisions) HTML/CSS/JS prototypes for every screen — Summary, Launch Recap, Performers, Reorder, Onboarding, Settings, Monday morning email Next.js starter codebase with all API routes, Shopify OAuth, data pipeline, database schema, and TypeScript types written Signed NDA required before materials are shared What we need you to build: React frontend components wired to the existing API routes Shopify App Bridge integration for embedded app behavior Proper session management and webhook handlers Production hardening and deployment on Vercel Shopify App Store submission and approval Required: Published Shopify app (link required in your response) Strong Next.js + React + TypeScript Shopify Admin API — orders, products, inventory, refunds PostgreSQL and Prisma ORM Shopify App Bridge experience To respond, please include: A link to a Shopify app you have built and shipped What you see as the hardest part of this build Your proposed approach — timeline, fixed price or hourly, milestones Proposals without all three will not be reviewed. We are looking for the most experienced Shopify developer, not the lowest bid. Please note that a 30 min video call will be requested prior to hiring.