He received his B.Sc. degree in physics and math, M.Sc. in high energy physics, and Ph.D. in interdisciplinary physics, all from HUJI. He was a postdoctoral fellow at Yale University. Yaari joined the faculty of Engineering in 2013. His current research interest focuses on the development of computational and statistical tools to process and analyze high-throughput biological data, with a special spotlight on the adaptive immune system.