AI/ML Engineer

ABOUT THE ROLE Join an AI/ML team building tools to make production AI agents more reliable. You will own the intelligence that identifies agent failures, assesses confidence, and checks whether proposed fixes work. WHAT YOU'LL DO - Detect subtle failures, including omissions, compliant but incorrect responses, and patterns that emerge across large volumes of traces. - Turn user behavior signals, such as rephrasing, abandonment, and retries, into evidence of agent failures. - Build evaluation methods to measure detection precision when labeled ground truth is limited or unavailable. - Make patch generation trustworthy by reproducing failures, verifying proposed fixes, and avoiding low-confidence changes. - Improve the cost efficiency of detection, choosing appropriate models and approaches for each event. - Review production customer traces regularly to identify problems and opportunities for improvement. WHAT WE'RE LOOKING FOR - Demonstrated AI/ML engineering experience; candidates with 0 to 10 years of experience are welcome, including new graduates and people without a traditional degree. - Hands-on experience using LLMs in production, including evaluations, LLM-as-judge, embeddings, and deciding when a smaller model or no model is appropriate. - An individual-contributor engineering background and a track record of shipping products that people use. - Strong research judgment and the ability to distinguish meaningful improvements from noise, especially when ground truth is unavailable. - Experience running agents in production and learning from their failures is a plus. COMPENSATION & BENEFITS Base salary: $120,000 to $200,000 annually. Visa sponsorship is not available. LOCATION On-site in San Francisco, United States.