I built a mobile shopping app called Mau, which interfaces with my client’s backend ordering & inventory system (which I had also custom built for them in the past). This is a private shopping app – so it’s only accessible by my client’s customers.
The app can hook into multiple inventory systems, so it’s not tied to just one – you can actually power a number of eCommerce stores with it, letting end-users switch between stores. It was built in React Native using the Expo framework. I also created the API to the backend systems using Ruby on Rails, along with a system for inviting customers to use the app.