Full-Stack Software Engineer, Design

ABOUT THE ROLE Join a growing team building AI infrastructure and tools for creating and evaluating AI training environments. You will combine front-end engineering and product design to make complex agent workflows clear, useful, and actionable. WHAT YOU'LL DO - Design and build interfaces across a product platform and marketplace, 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 their challenges, and improve the product based on their feedback. - Develop thoughtful interaction patterns and uphold a high bar for usability, visual quality, and implementation. WHAT WE'RE LOOKING FOR - At least 3 years in a design engineering, product design, or similar role shipping product interfaces. - Experience primarily as a full-stack engineer with design experience, including front-end skills and a track record of turning designs into working interfaces. - A portfolio demonstrating strong visual design and shipped product work improved through user feedback. - Technical education or strong technical fundamentals, with the ability to explain complex concepts clearly. - Experience collaborating closely with engineers and researchers. - Developer tools, data-rich products, research software, AI agents, evaluation, reinforcement learning, or training data experience is useful. - Experience building reusable interface patterns or working independently in an early-stage company is a plus. COMPENSATION & BENEFITS Base salary: $130,000 to $225,000 USD annually. Visa sponsorship is available. LOCATION On-site in San Francisco, California, with remote options available.