Android Developer Needed – Offline GPS Navigation & Safety App

Description I am looking for an experienced Android developer to build the first version of an outdoor safety app called Lost-in-the-Woods Retrace. The app records a user’s movement outdoors and allows them to retrace their path safely using a breadcrumb trail and compass guidance. The application must work offline and include an SOS safety system. A full specification package, flow diagrams, UI mockups, and project documentation are already prepared. Core Features to Build GPS Tracking record breadcrumb trail using GPS store coordinates locally track distance from starting point Navigation retrace arrow guidance using breadcrumb points compass heading deviation warning if user leaves path Location Tools mark start location mark car, camp, or custom points return to marked point Safety System SOS alert with last known coordinates send SOS to up to 3 emergency contacts include breadcrumb path in message prepare SOS when battery reaches 10% prompt SOS at 5% Offline Operation The core navigation system must work without cellular signal. Technical Preferences Preferred stack: Android (Kotlin) Google Fused Location Provider SensorManager for compass Local storage (Room or similar) Architecture preference: modular offline-first scalable toward future group safety features Deliverables Milestone 1 GPS breadcrumb tracking start point recording local storage Milestone 2 retrace arrow navigation compass integration mark location tools Milestone 3 SOS safety system low battery alerts emergency contacts Ideal Candidate Looking for a developer who has experience with: GPS/location apps sensor-based navigation offline-first mobile apps Kotlin Android development Bonus experience: hiking or outdoor navigation apps Mapbox or Google Maps SDK Project Assets Provided You will receive a complete developer package including: full feature specification UI mockups app flow diagrams safety architecture documentation Budget Flexible depending on experience. Please include: links to similar apps estimated timeline proposed development approach Estimated Scope Initial MVP expected in 4–8 weeks. Please start your proposal with the word Compass so I know you read the description. Apply tot his job