Alistair Pullen
Co-founder of Cosine, building AI that reasons like a human engineer
London, England
Summary
Alistair Pullen is a visionary AI entrepreneur and engineer, recognized for co-founding Cosine, a Human Reasoning Lab. His primary achievement is leading the development of Genie, an autonomous AI software engineer that has set new industry benchmarks on the SWE-Bench evaluation, demonstrating a significant leap in AI's ability to reason and perform complex software development tasks. His approach focuses on training AI with data that explicitly codifies human engineering thought processes, moving beyond simple prompting of foundational models. cosine+4
Pullen's career path highlights a consistent focus on cutting-edge software and AI, from early freelance work to leadership roles at fast-growing tech companies. He gained foundational experience in AI infrastructure and deep learning models at Fancy and Gopuff, before venturing into startup co-founding with Buoy and a 'Stealth Mode' project that eventually evolved into Cosine. This progression showcases his hands-on technical expertise combined with a strong entrepreneurial drive. weekday+1
His commitment to innovation extends to practical developer tools, exemplified by his work on Buildt, an LLM-powered VS Code extension. This project, which facilitated semantic code search and explanation, reflects his understanding of developer needs and his ability to leverage AI to enhance productivity at a granular level. Buildt represents an early, significant step in his journey toward creating more intelligent and integrated AI solutions for software engineering. x+2