Overview

During my time at PayPoint, I was tasked with building a push notification service for the BBC to allow them to send push notifications to their users when their TVL Licensing account had a low balance.

How was it built?

The Push Notifications were built using C# with Firebase. It worked by storing push token information for each user from a mobile app we have. This allowed people to enable / disable push notifications for a specific device. It also meant that a single user could have multiple devices registered.

Backend

I was responsible for building the backend services that would be used by the mobile app.

• C# and .NET Web API used as the primary language and framework.
• Firebase used for delivering push notifications to mobile devices.
• Azure Cosmos DB used for persisting push token information.
• Azure Service Bus used for cross-service communication.
• Grafana, Loki and Prometheus used for monitoring and observability.

Frontend

The frontend was not built by me, instead we had a separate mobile app developer that built and maintained the app. I worked with them to integrate the push notifications into the app.

• React Native The main framework that the mobile app was built with.