Build a customer portal MVP with Next.js and PostgreSQL

We are a logistics SaaS (40 business customers) and need a customer portal where clients can track shipments, download invoices and manage users. Scope: - Auth with roles (admin, member) - Shipments list with filters and detail page - Invoices list with PDF download - User management We have a REST API and a Figma design ready. Looking for a senior developer who can work in milestones: design review → frontend → integration → launch.