I am embarking on a green-field build of an end-to-end business platform and I need an experienced full-stack partner who has taken similar products from concept right through to launch. Scope The core of the project is a web application that must run smoothly on desktop, mobile, and tablet browsers. Native iOS and Android apps will follow, powered by the same back-end. Alongside standard account, billing, and workflow modules, three integrations sit at the heart of the build: 1. Outlook email integration – send, receive, and track messages directly from within the app using Microsoft Graph or comparable Outlook APIs. 2. AI-driven document automation – the system should draft proposals, letters, and other routine paperwork, plus gather reference information from both public websites and inbound phone interactions. 3. Telephony – click-to-call, logging, and call recording, ideally through Twilio or an equivalent cloud voice provider, with transcripts fed back into the AI module for analysis. Key Deliverables • Responsive web application (desktop, mobile, tablet) • Native iOS and Android apps that mirror web functionality • Secure Outlook email integration, including authentication flow and message tracking • AI services for document generation and data extraction from web and voice sources • Telephony layer with call control, recording, and transcript capture • Scalable back-end (Node, Django, Laravel, or comparable) with REST/GraphQL API • Admin console, user management, and role-based permissions • Deployment pipeline and production hosting setup Acceptance Criteria • Zero critical bugs across the three target form factors • Average in-app email send/receive latency <2 secs • AI module produces first-draft documents within 5 secs of request and achieves a minimum BLEU score agreed during discovery • 99 % successful call connection rate and transcript accuracy above 90 % on clear audio • Mobile apps accepted in both Apple App Store and Google Play If you have shipped a complex system that blends Outlook email, AI workflows, and telephony before, I would love to see it. Let’s discuss the architecture, milestones, and how you would tackle phase one.