What's wrong with Google recently? Continuously losing major losses. Just now Jeff Dean announced his resignation from Google to establish Discovery Loop. This is not easy, Jeff Dean is a legendary figure in the fields of computer science and artificial intelligence, known as the "Chief System Architect of Google" and the "programmer of Silicon Valley". 1. Jeff served as the Chief Scientist of Google and the core technology leader of Google DeepMind and Google Research before leaving. It is Google Senior Fellow/Level 11, which is extremely rare among hundreds of thousands of Google employees to reach Level 11, almost representing the ultimate authority of the entire Google technology system. 2. Jeff Dean has worked at Google for 27 years. His career runs through the era of massive data processing on the Internet and the era of modern artificial intelligence. His core achievements can be divided into three stages: 1) Infrastructure to lay the foundation of modern Internet (2000s) In the early days of Google's establishment, he led the development of a series of foundational systems that supported the entire Google ecosystem (and even the industry wide big data architecture): MapReduce: A groundbreaking distributed computing framework. It splits massive data processing tasks into tens of thousands of ordinary servers and runs them in parallel, which is a direct inspiration for later big data technologies such as Hadoop. Bigtable: a highly scalable and high-performance distributed structured data storage system that directly gave rise to the later wave of NoSQL databases such as HBase. Spanner: A globally distributed SQL database that breaks the dilemma of traditional databases struggling to balance consistency and availability. Search and Advertising System Architecture: Led the design of Google's early fifth generation search indexing and crawling system, as well as the early infrastructure of the AdSense advertising delivery system. 2) Promoting the AI Revolution and the Deep Learning Ecosystem (2010s) Creating Google Brain: In 2011, co founded Google Brain with Andrew Ng and others, introducing deep learning into Google's core business. TensorFlow: Led the development and open source of TensorFlow, one of the world's most famous deep learning frameworks, greatly reducing the threshold for researchers and developers worldwide to use AI. DistBelief&Pathways: We have designed DistBelief (an early large-scale distributed neural network training system) and Pathways architecture (which laid the foundation for the subsequent training of large-scale multimodal models such as PaLM and Gemini). 3) Integration and Leadership Era (2020s) Jeff has long served as the head of Google Research, leading the integration of Google AI and DeepMind. After the merger of Google Brain and DeepMind into Google DeepMind in 2023, as the Chief Scientist, he will focus on coordinating the system architecture and cutting-edge AI development of the next generation of super large models, such as the Gemini series. Recently, two big shots from Google left: 1) John Jumper, Vice President of Google DeepMind, has jumped to Anthropic. He and Demis Hassabis were awarded the 2024 Nobel Prize in Chemistry for leading a team to develop the revolutionary AI model AlphaFold for predicting protein structures. 2) Noam Shazeer, Vice President of Google Engineering and Co Head of Flagship Model Gemini, has jumped to OpenAI. Noam Shazeer is one of the founders of Transformer architecture: co-author of the groundbreaking paper "Attention Is All You Need" that laid the foundation for modern large-scale models in 2017. The frontline battles are intense, and the generals of the unified army are leaving one after another, which should have a significant impact on Google.