As the founder and CTO of ZeroEval, a company funded by Y Combinator, Sebastian and his team lead the development of innovative technologies aimed at optimizing quality in AI today. Before this, he excelled as the founding engineer at Micro, an AI company backed by the prominent venture firm Andreessen Horowitz. He focused on developing the core technology for an all-in-one tool app built on email. During his time at Micro, the product attracted hundreds of users and generated significant interest through its waitlist.