Jean-Baptiste Dalle developed a Workflow Trigger Validation System for the elsa-core repository, focusing on improving the reliability of workflow scheduling and HTTP endpoint triggers. He implemented payload validation, refactored the existing HttpEndpoint validator, and introduced a Cron expression validator to ensure trigger configurations are correct before workflows are published. Using C# and leveraging skills in API design, backend development, and workflow orchestration, Jean-Baptiste’s work gated workflow publication on valid triggers, reducing the risk of misconfiguration in production. The depth of the solution enhanced both maintainability and reliability of trigger handling, reflecting a thoughtful approach to system design.