Justin Keoninh is a Member of the Design Staff at Arena.ai, where he focuses on creating evaluation experiences that help shape how frontier AI labs develop tomorrow's models. As one of two product designers, Justin helped Arena grow from $0 to $100M ARR in eight months. During his tenure across early staged startups, his work has contributed to $600M+ in revenue, reached 200M+ people, and helped build companies now worth a combined $60B+. Outside of work, Justin runs ultramarathons and is an a16z Design Engineer Fellow.
Member of Design Staff
Combines product design and engineering, including the leaderboard overview and backend services for its live activity feed.
Staff Product Designer
Product Manger & Designer
Product Design Lead
Co-Founder
