ML/Applied Research Scientist

About CHAI AICHAI is a social AI platform where millions of people create, share, and talk to AI characters. As of Sep 2026, it has 10 million active users and $100 million ARR. After receiving over $55M in funding from investors such as AMD and CoreWeave, CHAI AI is actively hiring engineers to expand its team.About the teamEngineering is 15–20 people with a flat structure. High impact on the product, fast iteration, and clear metrics to measure against.What you will work onOwn the research agenda for model training and evaluation — new training objectives, new eval metrics — and connect them directly to revenue.You might thrive in this role if you…2+ years of software engineering experienceHigh motivation and talented.High ownership: comfortable with ambiguity, able to define the problem and the plan rather than execute a predefined spec.Able to work in person at our Palo Alto Office.Compensation and benefitsTop pay AI startup in Bay Area. $610,000 – $750,000, paid 100% in cash.We benchmark against total comp at Meta, Google, and OpenAI — and pay that number in cash, not equity, with the option to trade a portion of cash for stock options.Health, 401k, unlimited PTO.Our interview processWe run a fast process - an offer can be given within 7 days of first contact.20 minute phone screen with our founder or engineer20 minute personality assessmentTake home assessment. 60-90 minutes to complete.One day onsite interview.