BigTable developers design, build, and maintain systems using Google's BigTable technology, a scalable NoSQL database designed for large analytical and operational workloads. They handle massive data sets, develop applications for data processing, and manage data storage. They also work on performance tuning, troubleshooting, and ensuring data consistency and integrity. BigTable developers often collaborate with data scientists and other engineers to optimize data retrieval and deliver insights. They must understand distributed system design, be proficient in programming languages like Java or Python, and have a deep knowledge of database architectures.