Michael Busch is the technical lead of Twitter's search infrastructure team. He designed and implemented Twitter's current real-time search index, which is based on Apache Lucene and serves more than 2 billion queries per day, while indexing more than 300 million documents per day.
Prior to Twitter Michael worked at IBM's Silicon Valley Lab on Enterprise Search and eDiscovery software. There he worked closely with IBMs research group on novel indexing technologies.
Michael contributed to Apache Lucene since 2005 and is committer on this project since 2006. During those years he added several features like posting payloads, multi-level posting list skipping and various indexing and search performance improvements. Most recently he helped implementing a new indexer threading model in preparation for Twitter's real-time indexing features.
Michael studied Computer Science at the University of Paderborn in Germany.