In 2021 a good friend of mine approached me with a contract after we had previously discussed the possibility of him hiring me. The idea was to build a real-time connection between his Slack and Discord servers to encourage chatting between the members split among those servers. This was intended to help establish the #1 Discord channel for remote workers and digital nomads.
This bridge was established on top of Discord's webhooks and Slack's real-time API. These allow us to process messages as they come in and impersonate the user across apps. ReactPHP allowed us to do this in the app's native language PHP.