A Lucene developer designs, develops, and maintains applications using Apache Lucene, a high-performance, full-featured text search engine library. They create complex search algorithms, optimize search performance, and ensure search accuracy. They handle indexing, parsing, and querying of large data sets, often dealing with unstructured and structured data. They integrate Lucene with other technologies to enhance data retrieval and analysis. In addition, they troubleshoot and resolve issues related to Lucene applications. They may also be involved in setting up and configuring Lucene servers, ensuring data security, and providing technical support for Lucene-based applications.