Knock is developing a notifications-as-a-service platform that eliminates the need for product and engineering teams to build their own notifications infrastructure. By using Knock's own system to handle notifications, they streamline processes such as user invite notifications and in-app notifications. When a team member invites another to the Knock dashboard, an email notification is sent, with a workflow set up to remind invitees if they haven't responded after three days, while ensuring no reminders are sent if an invite is accepted. In-app notifications are managed through a pre-built React notification feed, updating users in real-time when invites are accepted and allowing for potential email follow-ups if notifications are missed. Knock provides a user-friendly interface to manage notification content and delivery channels, enabling easy iteration and debugging without requiring engineering changes, while also standardizing engagement data. This approach simplifies the notification process and enhances user experience by abstracting complex backend processes, allowing Knock to efficiently welcome new users and maintain consistent communication.