Senior Full-Stack Developer for Voice-First AI SaaS Platform (Replit Experience Required)

Job Description: I need a senior full-stack developer to build a commercial-grade, voice-first AI SaaS platform. This is a serious product build, not a simple chatbot or landing page project. Replit Requirement You must have real experience using Replit as a development accelerator. We want someone who understands how to use Replit for: rapid scaffolding frontend workflow generation component/page generation iterative product refinement debugging and code cleanup But you must also know where developer judgment must take over, especially for: architecture security data model design voice/runtime implementation production integrations scalability final code quality Required Skills Full-Stack Development Next.js / React Node.js / backend API architecture Multi-tenant SaaS development Conversational AI/voice systems Replit development workflow Database design Role-based access control Production deployment practices Experience with real-time voice apps Experience with AI workflow/orchestration tools experience with billing and metering Experience with PDF/report generation experience with approval workflows and partner/client portals Preferred Build Approach We need someone strong in: frontend architecture backend/API development multi-tenant SaaS systems role-based dashboards conversational AI workflows real-time voice experiences production-ready implementation A key requirement is that you have hands-on Replit experience and know how to use it to accelerate development without sacrificing code quality, architecture, or maintainability. What You’ll Be Building This platform includes: white-label multi-tenant SaaS architecture role-based dashboards for internal users, partners, and clients guided multi-step discovery wizard technical review and approval workflow queue/status workflow from draft to launch client-facing PDF/report generation approval flow with print and e-sign readiness payment-link insertion into client-facing workflow embedded conversational voice experience on a webpage embedded website chatbot phone / VoIP conversational support long-term conversational memory usage metering and billing integration audit trail, permissions, and tenant-safe data boundaries Important Requirements This is a voice-first product Voice quality and low latency matter Web voice should include a talk/interact button and live conversational flow Demo voice sessions must support a capped session length with graceful end-of-session behavior Sales-facing users can submit and track requests, but cannot publish directly The system should recommend the final AI architecture automatically Strong approval and launch controls are required Clean UI/UX workflow and structured backend logic are required We prefer a developer who can: lock the UI/workflow layout first define the data model and state flow use Replit to accelerate implementation wire the backend and production services behind the approved UI/workflow contract harden and test the platform for launch To Apply, Please Send The most relevant SaaS or AI platform you have built Your exact role in that project Your experience using Replit on real projects Your recommended architecture approach for a voice-first AI SaaS platform Whether you prefer hourly or milestone-based work Your availability over the next 4–8 weeks 2–4 relevant examples only Screening Questions Have you built a multi-tenant SaaS platform before? Have you used Replit on a real development project? If yes, how? Have you built or integrated conversational voice or real-time AI workflows before? Have you worked on role-based dashboards and approval workflows? How would you sequence a project like this to reduce rework? What parts would you personally build yourself, and what parts would you use Replit to accelerate? Do you prefer hourly or milestone-based engagement? Ideal Candidate We are looking for someone who is: technically strong product-minded organized able to work from structured requirements able to turn business workflow into clean software architecture comfortable building both polished frontend flows and solid backend systems Engagement Open to: initial architecture + implementation plan phased build or full implementation if the fit is strong This can become a longer-term engagement for the right developer. Final Note Please do not send a generic proposal. We are specifically looking for a developer who can build a real product that combines SaaS workflows, AI, voice, approvals, and scalable backend architecture — and who knows how to use Replit effectively as part of that process.