Senior Full-Stack AI SaaS Developer for Voice-First Multi-Tenant Platform

Project Overview: Need an experienced full-stack developer to build a production-grade, white-label, multi-tenant AI SaaS platform with a strong voice and conversational interface component. This is not a simple chatbot project. We need someone who can design and implement a structured discovery workflow, role-based dashboards, technical review flow, approval workflow, client-facing report generation, billing/metering integration, and multi-channel conversational delivery. The product must support a premium, low-latency conversational experience across web and phone-based interactions, along with scalable backend orchestration and strong tenant isolation. We want a developer who can think like a product architect, not just a coder. What We Need Built: White-label multi-tenant SaaS platform Role-based dashboards for internal users, partners, and clients Guided multi-step discovery wizard with save/resume/autosave Technical review and approval workspace Queue/status workflow from draft through live deployment Client-facing proposal/report generation with PDF output Approval flow with print and e-sign readiness Payment-link insertion into client-facing workflow Embedded conversational voice experience on a webpage Embedded chat experience on a webpage Two-way texting/messaging support Phone / VoIP conversational support Long-term conversational memory Multilingual support Usage metering and recurring billing integration Audit trail, permissions, and tenant-safe data boundaries Important Product Requirements: Voice quality and latency matter a lot The web voice experience should include a talk/interact button and session states Demo sessions on the web should support a capped session time with graceful session-ending behavior Sales-facing users can submit and track, but cannot publish directly The system should recommend the final AI architecture automatically based on business needs Strong approval and launch controls are required Clean UI/UX and structured workflow logic are required Must be production-minded, secure, and scalable Preferred Build Approach: We prefer a developer who can first lock the UI/UX workflow and data model, then wire the backend and orchestration layer cleanly behind it. Required Skills / Experience: Senior full-stack SaaS development Strong frontend experience with modern React-based frameworks Strong backend/API architecture Multi-tenant SaaS architecture Role-based access control and permissions Real-time conversational/voice application experience Workflow automation/orchestration experience PDF/report generation Billing and usage-metering systems Secure secrets handling and production deployment practices Experience with scalable cloud deployment and always-on services Strong communication and ability to work from structured product requirements Nice to Have: Experience with real-time voice pipelines Experience with AI workflow builders/orchestration runtimes Experience with partner/reseller portals Experience with approval workflows and enterprise dashboards Experience with multilingual conversational systems Experience with metered SaaS billing and overage logic Ideal Candidate: We are looking for someone who is: technically strong product-minded organized able to follow structured requirements able to translate business workflow into clean software architecture comfortable building premium user-facing experiences, not just backend services Budget / Duration: Open to discussion based on experience, relevance, and quality of prior work. Final Note: Please do not send a generic application. We are specifically looking for a developer who has built systems that combine SaaS, AI workflows, voice/conversational experiences, approvals, and scalable backend architecture.