Co-Founder & CTO

ABOUT THE ROLE Join an AI-powered creative advertising company as a full-time technical co-founder and own its technical and research direction. You will develop a proprietary platform for training and evaluating creative AI, building on existing product workflows and real-world feedback. WHAT YOU'LL DO - Set technical and research strategy, from current workflows through the development of a training and evaluation platform. - Build data infrastructure connecting creative briefs, submissions, generation traces, decisions, critique, and campaign outcomes. - Develop systems to evaluate, rank, critique, generate, and improve creative work. - Design allocation policies that direct campaign budgets and support useful data collection. - Make decisions about frontier models, fine-tuning, post-training, reinforcement learning, and original research. - Build reliable production infrastructure for creative workflows, experimentation, training, and inference. - Set standards for data quality, consent, privacy, measurement, and model evaluation. - Recruit and lead the first engineering and research team, and work directly with creators and brands. WHAT WE'RE LOOKING FOR - Typically 3 to 20 years of relevant experience, with hands-on experience building preference or reward models, RLHF, ranking, or evaluation systems. - Experience applying causal inference to observational data, including selection bias, counterfactual or off-policy evaluation, and adaptive experimentation. - Have shipped products or features used by people and worked on production ML tied to business outcomes, such as ads, marketplaces, recommenders, or ranking. - Strong Python and production ML infrastructure experience, plus ownership of a model, evaluation, or infrastructure program end to end. - Experience with noisy, delayed, or subjective outcomes; bandits, sequential allocation, multimodal systems, or agents is valued. - Track record recruiting and leading technical talent, and willingness to commit full-time as an equal co-founder in an early-stage environment. COMPENSATION & BENEFITS Approximately 28% equity as an equal co-founder. Cash compensation is discussed based on circumstances and fit. Visa sponsorship is not available. LOCATION On-site in San Francisco, California, United States.