ResqRoute: Flutter patient and paramedic apps with a React dispatch centre on a FastAPI backend

Delayed ambulance response is one of India's most pressing public health challenges. Without real-time tracking, a caller has no idea when help will arrive; without intelligent dispatch, the nearest available ambulance is not necessarily the one sent; without traffic-aware routing, urban journeys take longer than they need to. The absence of all three was costing lives.

Hospitals, paramedics and patients each needed their own view of the same emergency, connected in real time, on a platform that worked reliably under high-stress conditions with minimal latency — and kept working on poor networks and, when necessary, offline. ATS designed and built it end to end through our mobile engineering and Python backend practices.

The backend is FastAPI — an async Python framework chosen for high-throughput, low-latency handling of real-time events — with PostgreSQL as the system of record for incidents, patients, paramedics and vehicles. Firebase carries the live GPS stream between the apps, which is what keeps location refresh at one second even on 3G rather than polling the API. Google Maps SDK provides routing that accounts for live traffic.

Both mobile apps are Flutter from one Dart codebase; the dispatch dashboard is React.js on the web. The division is deliberate: paramedics and patients need native-feeling mobile apps that survive bad networks, dispatchers need a large-screen console. It is the same Flutter-plus-FastAPI architecture we used for the Zomee delivery super-app, applied here to a healthcare problem where latency is measured in lives.