Full-Stack LMS Platform: Desktop + Mobile Web + Native App (React / React Native)

We are building a proprietary e-learning platform for professional training programs. The platform will serve as the core product for delivering video-based courses, certifications, and live sessions. Core features: Protected video streaming (no download) Student dashboard with progress tracking Quizzes and module completion system Automated PDF certificate on course completion Payment integration (Stripe, one-time purchase) Live session scheduling (Zoom integration) Admin panel (users, content, analytics) Multilingual UI (EN, ESP — Phase 1) Tech stack: Open to suggestions. Prefer React / Next.js + Node.js + React Native for mobile. In your proposal please include: Examples of similar platforms you have built Your recommended tech stack and why High-level timeline with milestones