A Hadoop/HBase developer designs, builds, and maintains systems and applications using Hadoop and HBase, big data technologies. They work with large datasets, ensuring efficient storage, retrieval, and processing. The developer creates scalable and high-performance web services for data tracking, implements complex Hadoop-based applications, and manages Hadoop jobs using scheduler. They also perform data extraction, transformation, and loading (ETL), and analyze raw data to find insights. Additionally, they are responsible for maintaining privacy and data protection standards. Knowledge in Java, SQL, and scripting languages is crucial for their role, as is the ability to troubleshoot complex problems.