An Apache Nutch developer specializes in using the Nutch open-source web-search software to create, optimize, and maintain web crawling and indexing systems. These developers utilize Nutch's extensible interfaces to extract, parse, and store web content, and integrate it with existing databases or search engines. They also handle Nutch's scalable linking, which is crucial for large-scale web crawlers. Additionally, they are responsible for troubleshooting any issues, enhancing the software's performance, and ensuring its security. They often work closely with data scientists and other developers, using Apache Nutch's capabilities to facilitate data mining and information retrieval.