I’m a software engineer, designer, and researcher. I work on technologies that expand what people can think and do. My methods meander between academia and Silicon Valley: I explore theories by expressing them in real-world systems, which produce insights I use to improve the theories, which I use in turn to improve the systems, and so on. Prior to my current work, I helped build iOS at Apple and led R&D at Khan Academy. I’m now an independent researcher, supported by a crowdfunded grant from my Patreon community. If you find my work interesting, you can become a member to get patron-only "letters from the lab" and early access to new work.