How we built it: Running Replay on Temporal

The narrative recounts the experience of building a customized, conference-level registration system for Temporal's annual event, Replay, utilizing the Temporal platform. The project involved developing an intricate ecommerce system that handled payments, emails, and sensitive data while ensuring reliability and durability through Temporal's Workflows, Activities, and Signals. By leveraging Temporal's features, the development team transformed what could have been a complex integration of various PaaS/SaaS systems into a streamlined, observable process that managed everything from ticket sales to attendee registration and email notifications. This approach minimized the risk of common ecommerce issues, such as duplicate charges, by shifting responsibility to the Temporal platform, which maintained state and managed retries automatically. The author reflects on the benefits of using Temporal, particularly in terms of simplifying the architecture, enhancing error handling, and providing a coherent event history for customer support, highlighting the platform's suitability for long-lived, event-driven processes that go beyond the capabilities of traditional request/response models.