Full Stack Product Engineer

Job title: Full Stack Product Engineer Location: London; full in-office working as default Start date: ASAP Reports to: Head of Engineering Compensation: £90,000 - £100,000 EQUITY ___________________________________________________________________________ Cosine at a glance Cosine is the UK's frontier AI lab for autonomous software engineering — not another coding assistant, but our own models, agent stack, eval harnesses, and product layer. We build our agent tooling entirely in-house and pos…