Founding Machine Learning Engineer

ABOUT THE ROLE This is a founding-level, hands-on ML engineering role at a fast-growing Series A AI startup in the Bay Area, specializing in high-quality training data, post-training data pipelines, and model evaluation for frontier AI labs and enterprises. You'll work closely with leadership to design, train, and ship production-grade ML systems — while helping shape the technical culture and infrastructure from the ground up. This role is fully on-site in Mountain View, CA. Candidates must be authorized to work in the US without visa sponsorship. WHAT YOU'LL DO - Build and optimize end-to-end ML pipelines, from data ingestion through to production deployment. - Implement and fine-tune LLMs, embeddings, and generative models for real-world applications. - Develop efficient training and inference systems leveraging distributed compute at scale. - Partner with data and product teams to translate ideas into measurable ML impact. - Contribute to model monitoring, evaluation, and continual