Peter Czaník developed Elasticsearch Data Streams support for the axoflow/axosyslog repository, focusing on enhancing syslog-ng integration with modern log analytics workflows. He refactored the elasticsearch() destination to enable data streams using op_type("create"), streamlined parameter handling by allowing omission of the type parameter, and improved compatibility with OpenSearch by aligning configuration paths. Working primarily in C and JSON, Peter addressed syslog-ng issue 5583, which improved the reliability and scalability of log delivery to Elasticsearch and OpenSearch. His backend development work enabled smoother onboarding of data streams, supporting more robust and scalable log ingestion for enterprise environments.