Website and App Bug Fixing

I'm looking for a reliable developing agency to enhance my current website and app. The main task is to ensure everything runs smoothly and is bug-free. The ideal candidate will have experience in web and app development, focusing on quality assurance and bug fixing. its one platform for consumers, photographers, and commercial buyers — from creative design to AI-approved files to physical production of prints, photo books, gifts, wall decor, signs, and apparel. The product today A marketing + e-commerce site AI-powered designers for photo books, gifts, prints, collages, calendars, wall art, and signs A full point-of-sale (POS) system with appointments, inventory, register management, and customer rewards A back-office hub for catalog, pricing, orders, production monitoring, and staff roles Windows desktop apps for POS, Kiosk, Print Station, Admin, and more Integrations with Stripe, Twilio, QuickBooks, Adobe, Canva, Figma, and ShipStation (in progress) The stack React 19, TanStack Start, Tailwind CSS v4, Supabase, Stripe, Electron. What we need from you Finish active integrations: messaging (Twilio/WhatsApp), QuickBooks Online, ShipStation, and local delivery via Swifly. Harden security and storage policies, especially multi-tenant scoping. Polish the designer UX across photo, book, gift, and print tools. Maintain and update the Windows desktop apps as the platform evolves. Build clean, documented, reusable components following our existing patterns. How we work All routes live in src/routes/. Backend logic uses createServerFn. Admin/manager gates use role checks, not client-side flags. Assets go through lovable-assets. Security-first: RLS, storage policies, and secrets are non-negotiable. Ready to onboard. We'll walk you through the repo, priorities, and access.