Job Description
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.
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