A Hypertable developer works on Hypertable, an open-source technology designed for managing and analyzing large amounts of data. They are responsible for designing, developing, and maintaining the Hypertable system, ensuring it effectively stores, retrieves, organizes, and processes data. They work on data modeling, query optimization, and system performance tuning. They also debug issues, provide solutions for complex problems, and ensure the system's scalability and reliability. Their role involves collaborating with other developers, data scientists, and stakeholders to understand their data needs and implement suitable Hypertable solutions. They also document and test their work to maintain quality.