I’m midway through a React Native driver app and now need a specialist to wire in a truly seamless, Uber-grade GPS module. We will be using Mapbox as the primary map service and I expect fresh location data every single second, even when the phone is in the driver’s pocket or the app is in the background. What you’ll build is a live tracking flow where the driver icon and its polyline glide in perfect sync—no jumps, drifts, or buffering. When the vehicle leaves the prescribed route, your code should detect it within that same one-second window, snap position to the nearest road, and pull a new route instantly, including U-turn logic when appropriate. Turn-by-turn voice prompts need to adjust on the fly so the driver never notices the reroute. Performance is critical: animation must stay above 60 fps and network calls should be throttled or batched so we don’t blow through Mapbox quotas. The driver should also receive real-time speed readings, audible overspeed warnings, and events for harsh braking. Acceptance criteria • Continuous foreground & background tracking at 1 s intervals • Marker + polyline perfectly aligned at all times • Instant dynamic rerouting with road-snapping & U-turn detection • Smooth 60 fps animation on mid-range Android & iOS devices • Voice navigation that updates immediately after every reroute • Speed and harsh-braking events exposed via callbacks Ship clean, well-documented TypeScript components plus any native modules or server hooks required so my team can drop them straight into the existing codebase, run yarn install, and see it work.