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.