Senior Full-Stack Software Engineer, Design

About the Role Join a product team building tools for creating and evaluating AI training environments. You will combine design judgment with front-end and full-stack engineering to make technically complex workflows clear, useful, and actionable for users. What You'll Do Design and build product interfaces from early concepts through launch. Make agent runs, evaluation results, reward signals, and quality feedback understandable and actionable. Partner with research and engineering to turn reinforcement learning and evaluation workflows into useful tools. Talk with users, observe where they struggle, and improve the product based on their feedback. Develop reusable interaction patterns and maintain a high bar for usability, visual quality, and implementation. What We're Looking For At least 3 years of experience in design engineering, product design, or a similar role shipping product interfaces. Front-end engineering skills, with experience turning designs into working interfaces; full-stack product engineering experience is also relevant. A portfolio of shipped design-engineering work and a track record of improving products through user feedback. Technical education or strong technical fundamentals, and experience working closely with engineers and researchers. Good product and interaction design judgment, with the ability to explain technical concepts clearly. Experience with developer tools, data-rich products, research software, AI agents, evaluations, reinforcement learning, or training data is useful. Compensation & Benefits Salary range: $130,000 to $225,000 USD annually. Visa sponsorship is available. Location Primarily on-site in San Francisco, California, with some remote arrangements available.