Low-Pollution Routing App Build

Project: Air Pollution Route Finder App — Full Stack (iOS, Android, Web + Backend) I need a production-ready app that finds the lowest-pollution route between two points in London. What it does: - User enters A to B, app returns 3 route options: cleanest, fastest, balanced - Live air pollution heatmap overlay on the map - street level - Walking, cycling and driving modes - Turn-by-turn navigation on mobile -uses breathme london api, tomtom api **Required stack:** - Backend: FastAPI or Node.js - Mobile: React Native, Type script - Web: React + TypeScript + MapLibre GL JS Hard requirement: Pollution scores must be pre-cached per road segment — not calculated per request. Tell me exactly how you'll achieve this in your proposal.

Projektin tunnus (ID): 40326816