Nelson Elhage

Nelson Elhage is a systems engineer turned AI safety researcher who has left fingerprints across the modern software stack. At Anthropic, he co-authored foundational work on mechanistic interpretability and transformer circuits that shaped how the field understands language models. Before that, he was employee ~30 at Stripe and a founding engineer of Sorbet, the Ruby typechecker now used across one of the world's largest payment platforms. His open-source tools - reptyr, livegrep, and ministrace - are staples in the Linux hacker's toolkit. He blogs at 'Made of Bugs' and runs a Buttondown newsletter on computer systems.