The Einstein Telescope will simultaneously detect and process multiple gravitational wave signals in the tens of kilohertz range. In parallel the data of hundreds of sensors needs to be processed. The signals need to be processed in realtime, resulting in processor intensive complex computations. Many sensors operate at cryogenic temperatures and in ultra-high vacuum conditions. Ultra-precise control is needed in the vacuum towers to maintain micrometer-level alignment of mirrors over 10 kilometers apart. The ambitious Einstein Telescope project requires groundbreaking advancements in sensors, data networks, processing hardware, and algorithms. This talk will explore some of the critical challenges the Einstein Telescope faces.