Yujian Tang, a developer advocate at Zilliz, has an extensive background in computer science, statistics, and neuroscience. He previously worked as a software engineer at Amazon and researched machine learning. Tang chose to join Zilliz due to their focus on vector databases and the company's commitment to open-source ethos. As a developer advocate, he works with cutting-edge AI technologies and hosts meetups and conferences. He encourages others interested in DevRel roles to consider joining Zilliz.