The front-end is built in React. The service is deployed as a single Spring Boot application written in Kotlin. In terms of workflows, there is state machine that jobs process through (asynchronously with persistent state) within the service itself. It depends on no external workflow engines.

Infrastructure components include CosmosDB, Azure Blob Storage. The service is deployed as an App Service.

The STT and Search tech I'll keep under-wraps for now as they may change.