Ian Brast developed features for GetStream’s stream-chat-js and stream-chat-go repositories, focusing on enhancing chat application functionality and user experience. He implemented cross-language support for marking messages as unread by timestamp, allowing users to control message visibility in long threads. This involved backend development in Go and TypeScript, with added unit tests to ensure reliability and feature parity across clients. Ian also delivered channel-wide notifications with default user preference handling in stream-chat-js, streamlining notification delivery and reducing manual configuration. His work demonstrated depth in API integration, backend development, and test coverage, addressing product requirements and improving consistency for end users.