A Lexalytics developer is responsible for leveraging the Lexalytics software, a leading text analytics and natural language processing platform. They work on extracting valuable insights from unstructured text data like social media content, emails, documents, and more. Their tasks include implementing sentiment analysis, named entity recognition, summarization, theme discovery, etc. They also build, test, and maintain these systems, ensuring their efficiency and accuracy. Additionally, they may work closely with data scientists to develop machine learning models for predictive analytics. Their goal is to help businesses make data-driven decisions, improve customer experience, and identify trends and patterns.