I am rolling out a cloud-based pathology platform built on a Linux server stack with Node.js at its core. Alongside the web portal, I need companion mobile apps for both iOS and Android that let patients book tests, pay securely through Razorpay or Pine Labs, and follow a phlebotomist’s live location from collection to sample drop-off. Core scope • Back-end: Clean, modular Node.js code that can scale on a standard Linux VPS or container setup. • Web portal: Dashboard for lab admins to create tests, manage orders, upload reports, and view real-time driver status. • Mobile apps (iOS & Android): – Patient side: registration, test selection, payment checkout, appointment calendar, live tracking, report download. – Phlebotomist side: job list, GPS routing, start/stop tracking, proof-of-collection upload. • Payment: direct integration with Razorpay or Pine Labs (whichever you have stronger experience with). • Real-time tracking: socket or MQTT-based location feed, displayed on both the admin dashboard and patient app map. • Basic security, JWT-based auth, and simple audit logs. Acceptance • Clean, well-commented source in a Git repo. • One-click deployment script for the Linux back-end. • Two app builds ready for TestFlight and Google Play Internal Testing. • Demo walk-through showing a full booking-to-report cycle with live tracking and payment confirmation. When you respond, focus on your experience shipping Node.js back-ends, integrating Razorpay/Pine Labs, and publishing cross-platform apps that deal with real-time location. Links to similar healthcare or logistics projects will help me shortlist quickly.