Full-Stack Developer for SaaS Dashboard

We run a small B2B SaaS platform used by logistics teams to manage customer orders, delivery notes, invoices, and internal approvals. The app is already live, but we have several issues affecting daily use: The dashboard loads slowly when users filter large order lists. Some invoice statuses are not updating correctly after payment. Admin users also need a better way to edit customer records without touching the database directly. We are looking for a full-stack developer who can review the existing codebase, identify the main issues, fix the highest-priority bugs, and help us improve the product over time. Current stack: React Node.js / Express PostgreSQL Prisma AWS S3 Stripe Vercel / Render First scope: Review the order dashboard performance Fix invoice status sync issue Add simple customer edit flow for admins Document what was changed Recommend next improvements Please apply only if you have worked on production full-stack apps before.