My Solution for a Gozem technical Android assessment

The business case is a mobile application that allows the user to authenticate/register and track his/her GPS location in real time.

Operational modules of the solution

A mock server created with Postman

For the case, I created a mocked RESTful API interface exposing 3 endpoints :

• Authentication endpoint: POST {server_url}/authenticate
• Registration endpoint: POST {server_url}/register
• Registration endpoint: GET {server_url}/profile

A fully implemented native Android application

The android application has the following functions

• User authentication through RESTful webservice integration
• GPS tracking and Map display
• Instant messages display with Websocket

Tech stack to build the Mobile application

• Kotlin & Java programming languages
• MVVM architecture (for the projet's package and code structure)
• Android Jetpack (to implement the UI using modern design practices)
• Android Runtime Permissions management
• Navigation component (For user navigation flow through the app)
• Kotlin Coroutines (asynchronous and time consuming process)
• Retrofit2 library (for http requests over the network)
• Reactive streams (Rx Java/Kotlin)
• Google Maps API for the map display
• GPS
• Websockets
• JUnit and Espresso (unit tests and instrumented tests)
• Git