A Large-scale Data Analysis developer designs, develops, and executes high-volume data collection, processing, and analysis systems. They handle large sets of data, often unstructured, and convert them into a format that can be easily interpreted. Using advanced programming and analytical tools, they uncover trends, patterns and insights within the data. They also ensure data integrity, quality and security. Their work involves setting up data pipelines, automating data collection processes, and creating algorithms to sift through the data. They often work closely with data scientists and analysts, helping them to understand and apply the insights derived from the data.