Worked on the powersync-ja/powersync-service repository to enhance backend reliability by addressing a critical gap in observability. Focused on backend development using TypeScript, the work involved implementing a targeted fix to expose probe endpoints across API routes for versions 1.0.0 and 1.1.0. This change enabled consistent health checks and monitoring visibility, supporting production stability with minimal risk. The approach emphasized clear commit traceability and careful integration to avoid disruption. By resolving the missing probe endpoints, the developer improved the service’s monitoring capabilities, ensuring that health status could be reliably tracked across multiple API versions in a TypeScript environment.