Custom CRM Web App for Field Sales Team — React / Node.js / PostgreSQL

We are building a custom CRM web app for a French home renovation company (5 field sales reps working on iPad). The entire current process is paper-based — we need to digitize and centralize everything. A complete technical brief (13 modules fully documented) is ready to share. CORE MODULES TO BUILD: 1. Personalized dashboard per user role (sales rep / secretary / manager / director) 2. Client database — 2,000 contacts to import, full profile with status tracking, color-coded segmentation (easy / negotiates / blacklist), filters, search, full CRUD 3. Digital quote builder — iPad-optimized, catalog-based (4 renovation service categories), automatic HT/TVA/TTC calculation, on-screen electronic signature, automatic PDF order generation + email to client and secretary 4. Phoning module — contact assignment per sales rep with anti-overlap lock, call status tracking, full call history 5. Analytics dashboard — revenue vs targets, conversion rate per sales rep, live leaderboard, zone breakdown (by French department) 6. Service catalog — managed by admin, price per service, linked to quote builder ROLE-BASED ACCESS CONTROL: 4 profiles with different permissions (director sees everything, sales rep sees only their own data) TECH STACK: React (frontend) — Node.js (backend) — PostgreSQL (database) Must be PWA-compatible for iPad (add to home screen)