I need a backend/full-stack developer to complete, integrate, and deploy the backend for an existing real estate SaaS platform. ⚠️ Read carefully before responding: The frontend is already built and live (Netlify) All user flows, pages, and roles already exist This is NOT a design, UX, or exploratory task This is backend execution and integration only What Already Exists Fully built frontend CRM dashboard (Admin + User panels) Defined roles (agent / owner / developer) Established flows and screens Work Includes You will be responsible for connecting and completing the backend: Core Backend APIs Authentication & role enforcement Leads Properties Teams / seat logic Analytics Payments PayPal subscriptions Seat-based billing Webhooks Integrations Mapbox WhatsApp API (AI-assisted, API-level only) AI assistant Web/PWA push notifications Cloud storage Reporting Weekly reports Monthly reports Deployment Environment configuration Backend deployment (Render / Railway / AWS) Connect backend to existing frontend Final QA and production readiness Important — Read This Carefully The scope of work is clearly defined above. This is standard backend integration work: Connecting APIs Wiring existing systems Completing backend logic Deploying and validating If you have done this type of work before, you already understand: What needs to be connected What integrations are required What execution looks like The price for this job is fixed. We do not do hourly billing. We do not renegotiate pricing after discussions begin. We do not add discovery, audits, or exploratory phases. The price is for the job, not for time spent. If you are comfortable executing a defined scope for a fixed price, respond with: Your confirmation that you can complete this scope Your proposed milestone structure and execution order If you need exploratory access, open-ended discussions, or hourly billing, this is not a fit. Backend stack is Node.js. Frontend is React (already built and live). Backend must integrate cleanly with the existing frontend — no framework changes, no UX changes. PayPal subscriptions and seat-based billing are already defined. You are responsible for implementing the logic, webhook handling, and enforcement exactly as required. This is implementation, not discovery or business-rule design. We already have accounts and API credentials for: PayPal (sandbox + production) Mapbox WhatsApp API AI services Push notifications You will wire integrations and handle sandbox → production as part of deployment.