React/Next.js Developer for Mobile PWA

React / Next.js Developer — Mobile PWA with AI Integration, Stripe and App Store Submission About the project: We are building a B2B SaaS mobile application for a specific professional services market in Ireland and the UK. The app is in the finance and job management category. We have a registered Irish company and a LEO grant application in progress. This is a well-specified project. We have a fully working interactive prototype showing every screen and every user flow, a complete developer brief with 38 acceptance criteria, and a full workflow document. You are not figuring out what to build — you are building what is already designed and specified. A signed NDA is required before we share any of these documents. Tech stack required: React and Next.js. Supabase for database, authentication, and file storage in an EU region. Anthropic Claude API for AI features — server-side only. Stripe for subscription billing with webhooks and Customer Portal. WhatsApp Business API. Inbound email parsing. Progressive Web App with service worker and offline capability. Capacitor for iOS App Store and Google Play submission. OneSignal for push notifications. Vercel for hosting. What we are looking for: At least one live SaaS product in your portfolio — share the URL. Proven experience with Next.js, Supabase, and Stripe. Previous AI API integration experience. Comfortable working asynchronously with a European-based founder. Actively uses AI coding tools such as Cursor or GitHub Copilot. How to apply: Share a URL of a SaaS product you have built and shipped. Tell us your experience with the Anthropic Claude API or similar AI APIs. Tell us how you would approach integrating the WhatsApp Business API — this is the most complex part of the build. Give us a rough fixed price estimate To confirm you have read this post include the word Tipperary somewhere in your proposal. The NDA and brief: Shortlisted candidates will be asked to sign a short NDA before receiving the full prototype, developer brief, and workflow document. We will then ask for a detailed fixed price quote broken down by milestone. A paid test task of €100 to €200 will be given to the top two candidates before a final decision is made.