We are looking for a senior full-stack development team (8+ years experience) to take full ownership of our SaaS communication automation system. This is a long-term project with multiple milestones and parallel development tasks. We prefer a team structure (3 roles minimum) who can dedicate 48–60 hours per week. 📌 Scope of Work 1️⃣ UI/UX + Backend Foundation (Lead Engineer) Redesign UI/UX 3 dashboard (system admin, user admin, user) System architecture optimization Database optimization & security hardening Multi-tenant subscription validation 2️⃣ Messaging Automation Engine (Backend Engineer) Develop scalable message scheduling multiple engine Queue system & delivery tracking Error handling & retry mechanism Logging & monitoring system Modular architecture for future channel expansion 3️⃣ AI Chat Workflow System (AI Engineer) Drag & drop workflow builder AI auto-reply logic Intent recognition Multi-step automation flow CRM integration Lead tagging & follow-up logic Appointment booking flow 📌 Deliverables Fully functional SaaS platform Clean UI/UX Scalable backend architecture Deployment documentation Source code + API documentation Production-ready environment 📌 Timeline We expect milestone-based delivery within 3 weeks (negotiable after technical evaluation). Please provide: Detailed breakdown per module, how many hours and charges each Team structure 3 developer Weekly working schedule