(Senior) Scientist, Machine Learning

Job description

Build Models Where None Exist Yet. At Flagship Pioneering, we create companies from first principles. Within Flagship Labs, small founding teams define new technical theses, test them rapidly, and build ventures around breakthrough ideas. We are forming a machine learning team inside a newly launched venture, Flagship Labs 120. Our work focuses on extracting latent structure from information-rich measurements of complex physical systems—often requiring mechanism-informed modeling, thoughtful inductive bias design, and principled approaches to inverse problems. This is a zero-to-one role focused on modeling innovation rather than routine optimization. You’ll design, prototype, test, and refine new approaches that help define the technical foundation of a platform from day one. What You’ll Do: - Develop and iterate on ML models for complex measurement data, from representation design through validation - Design objectives and architectures that respect known constraints, symmetries, or latent structure in the data - Explore and compare modeling strategies, balancing strong baselines with more experimental approaches when appropriate - Investigate model behavior and failure modes to i...