Kevin Lo

A 100% Kotlin-based Android native implementation of an AR-based scooter parking solution.

This project consists of the development time and runtime portion. Development time involves capturing the parking space boundary—marked using QR codes placed in physical space—and the overall current environment's look and feel. When a rider attempts to park during runtime, the neighboring environment will be matched against some previously saved trackable data in the cloud. Once a match is found, matrix math is used to determine the precise location of the scooter head, which can be used to determine if that falls into the shape of the parking area. A follow-up improvement that speeds up the resolution or matching process involves using Google's Visual Positioning System (VPS).

A system I designed to alleviate the time it takes to serve various tutorials considering factors like geographical markets, feature flags, and scooter types.

I developed RESTful-style APIs using Kotlin and Dropwizard for external facing and internal administration. I built admin functionalities allowing operation people or the product manager to create a new tutorial or extend existing tutorials using admin interface-enabled Apache FreeMarker and RESTful API.

I also created the ability to have various "context" or insertion points so that tutorials specified can be shown automatically with little to no code added on mobile clients and the back-end API. Lastly, I constructed an extendable template-based model, allowing different styles of content to be shown for Android and iOS.

Developed a dual-mode operation—via Bluetooth or cellular connection—to unlock accessories in brand-new hardware, such as the battery pack and auxiliary lock on electric bikes. The user operation is done through a flight sheet-based UI on Android. Then, the user connects and issues the command to unlock the bike's battery compartment and auxiliary lock.

Integrated Stripe to satisfy the EU mandate for banks to use stronger payment authentication. First, we updated Stripe's payment API to use the newer intent-based API. Then, we reworked payment functionalities along with using updated Stripe Android SDK across the Android client to support the new style payment API for credit card, Paypal, and Google Pay processing.