Explore the challenges and solutions of processing large e-voting files in Switzerland's federated system through this 20-minute Devoxx conference talk. Learn about the integration of different cantons' data formats, focusing on handling extensive XML files without memory overload. Discover key aspects of the e-voting process, including the overall voting landscape, data integration tools, and specific techniques like Gravity Data Flow and XML Data Extractor. Gain insights into the architecture and implementation of a reactive streams approach for efficient big data processing in electronic voting systems.