Xander Song, Arize's new Developer Advocate, brings an interdisciplinary background and experience as a machine learning engineer at Test.ai to his role. He is interested in early-stage companies at the intersection of AI and ops and aims to shape processes, techniques, and best practices that define a developer's workflow. As a former researcher who transitioned into machine learning engineering, Song understands the importance of innovation in modern AI and ML, including the development of tools that support model performance. At Arize, he will focus on evangelism and advocacy for machine learning observability, emphasizing its role in improving quality of life for MLEs and data scientists while potentially making a difference between enterprise success and failure. Song brings a customer-obsessed mindset to his new role, having worked with startups and teams that prioritize user experience and value proposition.