Powering Cal.com's core booking engine with AI scans, calendar syncs, and durable async fan-out tasks

Morgan Vernay, an engineer at Cal.com, discusses how Trigger.dev has become essential to Cal.com's infrastructure, handling millions of monthly operations such as booking orchestration, calendar syncing, and fraud analysis. Cal.com, which provides scheduling infrastructure for a range of users from solo consultants to large enterprises, selected Trigger.dev for its ability to efficiently manage complex workflows involving numerous integrations like Google Calendar and Salesforce. The platform's user-friendly documentation and dashboard facilitated its integration into Cal.com's systems, allowing the team to quickly deploy production-ready workflows. Trigger.dev enables Cal.com to maintain high standards of booking speed and reliability by processing tasks such as email notifications, calendar updates, and fraud detection with robust retry mechanisms and small data payloads. This setup allows for seamless replay of workflows in case of failures, improving incident response and reducing the burden on on-call staff. The company plans to expand its use of Trigger.dev for real-time frontend updates, enhanced calendar syncing, and the deployment of more AI agents, building on its current use of the platform for tasks like phishing detection and user behavior analysis.

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